wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

8th Grade Science EOG Review 8.P.1

Total questions: 193

Worksheet time: 2hrs 1mins

Name
Class
Date
1.
What are atoms?
a)
The basic building blocks of all matter
b)
One of the phases of matter
c)
They travel in energy
d)
They are radiated from the sun
2.

Which subatomic particle is inside the nucleus of an atom, determines the atom's identity, and has a positive charge?

a)

Proton

b)

Electron

c)

Neutron

3.

Which subatomic particle is inside the nucleus of an atom, acts like glue, and has no charge?

a)

Proton

b)

Electron

c)

Neutron

4.

Which subatomic particle travels outside of the nucleus of an atom, determines the atom's chemical properties, and has a negative charge?

a)

Proton

b)

Neutron

c)

Electron

5.
Does an atom take up space and have mass?
a)
Yes
b)
No
6.
How many kinds of atoms are elements composed of?
a)
1
b)
2
c)
Hundreds
d)
Trillions
7.

When two or more types of atoms are combined chemically, they make what?

a)

Mixture

b)

Compound

c)

Solution

d)

Vapor

8.
When two or more different substances are physically combined, they form what?
a)
Compound
b)
Mixture
c)
Solution
d)
Vapor
9.
In a heterogeneous mixtures, particles are easily seen.
a)
True
b)
False
10.
What type of mixture is it difficult to separate and to view the individual substances?
a)
Heterogeneous
b)
Homogeneous
c)
Heterozygous
d)
Homozygous
11.
What are the three states of matter?
a)
Vapor, Liquid, Steam
b)
Liquid, Ice, Solid
c)
Solid, Liquid, Gas
12.
In a solid, the molecules?
a)
Move freely
b)
Do not move
c)
Move slightly
13.
In a liquid, the molecules?
a)
Do not move
b)
Will fill the shape of a container
14.
In a gas, the molecules?
a)
Do not move
b)
Move easily
15.

Who created the periodic table of elements?

a)

John Dalton

b)

Hennig Brand

c)

Antoine Lavoisier

d)

Dmitri Mendeleev

16.

An element is identified by

a)

its number of protons.

b)

the atomic mass.

c)

the type of charge.

d)

its number of isotopes.

17.

Each of the elements in the periodic table has a specific number. What does this number represent?

a)

the half-life

b)

the number of neutrons

c)

the number of protons

d)

the number of isotopes

18.

The number of protons and neutrons in the atom is its

a)

atomic mass.

b)

atomic number.

c)

atomic power.

d)

atomic clock.

19.

The element sodium appears like this in the periodic table. Which is its chemical symbol?

a)

11

b)

Na

c)

sodium

d)

22.990

20.

The chemical formula for baking soda is NaHCO3. How many different elements make up baking soda?

a)

1

b)

2

c)

3

d)

4

21.

How are elements ordered in the modern periodic table?

a)

by date of discovery

b)

by decreasing atomic mass

c)

by increasing atomic number

d)

by alphabetical order of element symbols

22.

The periodic table contains rows and columns. What are the horizon rows called?

a)

groups

b)

families

c)

columns

d)

periods

23.

How many periods does the periodic table contain?

a)

7

b)

8

c)

9

d)

10

24.

What are the columns of the periodic table called?

a)

periods

b)

rows

c)

tables

d)

groups or families

25.

How many groups does the periodic table contain?

a)

2

b)

3

c)

18

d)

32

26.

Properties such as magnetism, luster, and malleability have been used to group together which category of elements on the periodic table?

a)

metals

b)

nonmetals

c)

metaloids

d)

noble gases

27.

What general category describes the majority of the elements in the periodic chart?

a)

metals

b)

liquids

c)

nonmetals

d)

gases

28.

If a highly-reactive metal with one valence electron is discovered, in which group would the element best fit?

a)

group 1

b)

group 2

c)

group 17

d)

group 18

29.

Electrons located in an atom's outer most electron shell.

a)

electrolysis

b)

valence electrons

c)

electronics

d)

election

30.

Which statement best explains how periods on the periodic table are organized?

a)

increasing atomic number from left to right

b)

increasing number of neutrons from left to right

c)

decreasing number of electrons from left to right

d)

decreasing atomic mass number from left to right

31.

In which groups did Mendeleev most likely place highly-reactive elements?

a)

group 1 (IA) and group 17 (VIIA)

b)

group 1 (IA) and group 18 (VIIIA)

c)

group 2 (IIA) and group 18 (VIIIA)

32.

Which best explains how the periodic table is used to identify properties of elements?

a)

by the color and shape of the elements

b)

by the number of electrons in the elements

c)

by the group in which the elements are located

33.

An engineer needs a hard, non-magnetic semiconductor. Which element would best fit this description?

a)

aluminum (Al)

b)

carbon (C)

c)

silicon (Si)

d)

silver (Ag)

34.

Why does reactivity in non-metals most likely increase from left to right in the periodic table?

a)

atomic radius increases

b)

attraction for electrons increase

c)

attraction for electrons decreases

35.
What kind of properties can only be observed when a substance changes into a different substance?
a)
physical properties
b)
chemical properties
c)
liquid properties
d)
real properties
36.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
37.
Is hammering wood together to build a house a chemical or physical change?
a)
chemical
b)
physical
38.
Is bleaching your hair a physical or chemical change?
a)
physical
b)
chemical
39.
A change in the size, shape, or state of matter.
a)
chemical change
b)
physical change
c)
chemical reaction
d)
electron change
40.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
sour milk
41.
Kim puts an ice cube in a beaker and it melts. This is a good example of:
a)
a physical change.
b)
a chemical change.
c)
an experiment.
d)
an analysis.
42.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
43.
Which is a physical change?
a)
burning match 
b)
vinegar in baking soda 
c)
melting butter
d)
cooking an egg
44.
What is an example of a Chemical change?
a)
Ripped paper 
b)
boiled egg
c)
cracked egg
d)
sugar in water
45.
Which of the following is a chemical property of water?
a)
Reacts with pure sodium.
b)
Boils at 100 oC.
c)
Dissolves sugar easily. 
d)
Has a density of 1 gm/mL
46.
Which of the following is NOT a physical property?
a)
breaking a window
b)
color
c)
denisty
d)
freezing point
47.
Which is a chemical change?
a)
freezing fruit juice
b)
slicing a potato
c)
boiling water
d)
copper metal turning green
48.
One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?
a)
evaporation; chemical change
b)
condensation; physical change 
c)
evaporation; physical change
d)
condensation; chemical change
49.
How does a balanced chemical equation satisfy the Law of Conservation of Mass?
a)
During a chemical reaction, the total amount of matter stays the same.
b)
During a chemical reaction, matter is destroyed.
c)
During a chemical reaction, one or more new substances are formed.
d)
During a chemical reaction, the total number of atoms increases.
50.
Which is best represented by the equation?
2Mg + O2 → 2MgO
a)
Law of Conservation of Energy
b)
Law of Conservation of Mass
c)
Law of Superposition
51.
What is the importance of a closed container in a chemical reaction?
a)
to observe the mass before and after the reaction occurs
b)
to keep any materials from interfering with the reaction
c)
to observe the loss of mass after the reaction occurs
52.
Which best represents a balanced equation?
a)
120 grams of carbon plus 20 grams of oxygen → 200 grams of carbondioxide
b)
120 grams of carbon plus 50 grams of oxygen → 200 grams of carbondioxide
c)
120 grams of carbon plus 80 grams of oxygen → 200 grams of carbondioxide
53.

A chemical reaction occurs in a sealed test tube. As the results of the reaction 24 grams of product are produced. Which is most likely true?

a)

The mass of the reactants was 24 grams

b)

The mass of the reactants was less than 24 grams

c)

The mass of the reactants was more than 24 grams

54.

Which chemical equation correctly demonstrates the conservation of mass?

a)

KClO3 ---> KCl + O2

b)

H2O +CO2 -----> H2CO3

c)

Mg + HCl ----> H2 = MgCl2

55.

When vinegar and baking soda are combined, a mixture is produced, and gas is released. Which statement is true?

a)

The mass of the gas is equal to the mass of the vinegar and baking soda

b)

The mass of the mixture and gas is equal to the mass of the vinegar and baking soda

c)

The mass of the mixture and gas is greater than the mass of the baking soda and vinegar

56.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
57.
If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products?
a)
12 atoms of carbon (C)
b)
6 atoms of carbon (C)
c)
3 atoms of carbon (C)
d)
2 atoms of carbon (C)
58.
Which best explains why the total mass of the product(s) would be less than the total weight of the reactant(s) after a chemical reaction?
a)
A physical change occurred.
b)
Atoms involved in the reaction lost mass.
c)
Precipitates were created in the new solution.
d)
Gases were released to the atmosphere.
59.
How does a balanced chemical equation satisfy the Law of Conservation of Mass?
a)
During a chemical reaction, the total amount of matter stays the same.
b)
During a chemical reaction, matter is destroyed.
c)
During a chemical reaction, one or more new substances are formed.
d)
During a chemical reaction, the total number of atoms increases.
60.
What coefficient for O2 demonstrates the law of conservation of mass?
CH4(g) + __O2(g) → CO2(g) + 2H2O(g)
a)
1
b)
2
c)
3
d)
4
61.
Which is best represented by the equation?
2Mg + O2 → 2MgO
a)
Law of Conservation of Energy
b)
Law of Conservation of Mass
c)
Law of Superposition
62.
What is the importance of a closed container in a chemical reaction?
a)
to observe the mass before and after the reaction occurs
b)
to keep any materials from interfering with the reaction
c)
to observe the loss of mass after the reaction occurs
63.
Which equation is balanced according to the Law of Conservation of Mass?
a)
NaCl + Mg →
 MgCl2 + Na
b)
2NaCl + Mg → MgCl2 + Na
c)
2NaCl + Mg →
MgCl2 + 2Na
64.

Which of the following is a example of physical change ?

a)

burning of wood

b)

photosynthesis

c)

melting of ice-cream

d)

ripening of fruit

65.

What does the picture represent ?

a)

physical change

b)

chemical change

66.

Observe the picture and choose the correct option.

a)

Irreversible physical change

b)

Reversible physical change

67.

Which one is not the characteristics of a physical change ?

a)

They are changes in the physical properties of substance.

b)

They are irreversible

c)

Rearrangement of molecules take place

d)

No new substances are formed

68.

A chemical change may involve

a)

Evolution of gas

b)

Change in temperature

c)

Change in colour

d)

All of the above

69.

Which of the following is evidence of a physical change?

a)

New substance

b)

Shape Change

c)

Light produced

d)

Gas released.

70.
Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change. 
a)
Chemical then Physical 
b)
Physical then Chemical
c)
Both Physical
d)
Both Chemical
71.

What is the definition of chemical change?

a)

any change that results in the formation of one (or more) new chemical substance(s).

b)

changing of only the appearance of the object

c)

matter cannot be created or destroyed, only change form

d)

changes affecting the form of a chemical substance, but not its chemical composition.

72.
Which of the following is NOT a clue that a chemical reaction has taken place?
a)
Changing size
b)
Changing color
c)
A gas being formed
d)
Formation of a precipitate
73.
Define a physical property.
a)
Observations made or measured using your senses, without changing the identity of the substance
b)
Can only be measured using specific science equipment
c)
Only observed in situations where the identity of the object is changing
d)
Only measurable if the identity of the object changes  
74.

Choose every image that represents a chemical change.

a)
b)
c)
d)
75.
The substances listed on the right side of a chemical equation are the
a)
Yields
b)
Reactants
c)
Products
d)
Precipitates
76.
CaCO3 represents a chemical
a)
Symbol
b)
Formula
c)
Subscript
d)
Reaction
77.
How many Oxygen (O) atoms are in 2C2HO8Cl2
a)
2
b)
16
c)
8
d)
5
78.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
79.
Which one is a compound?
a)
Co
b)
Br
c)
Fe
d)
CO
80.

C2H6 + 5O2 → 2CO2 + 3H2O2C_2H_6\ +\ 5O_2\ \rightarrow\ 2CO_2\ +\ 3H_2O_2  
Given this chemical equation, what are the REACTANTS?

a)

C2H6 and 5O2C_2H_{6\ }and\ 5O_2  

b)

2CO2 and 3H2O22CO_2\ and\ 3H_2O_2  

81.

Observe the reaction shown here. The formula for this equation is N2 + H2 → NH3N_2\ +\ H_2\ \rightarrow\ NH_3  . What do you observe about the atoms of nitrogen in this reaction?

a)

There are 2 atoms of nitrogen in the reactants and only 1 in the products. This violates the Law of Conservation of Mass.

b)

There are 2 atoms of nitrogen in the reactants and 3 in the products. This violates the Law of Conservation of Mass. 

c)

There are 2 atoms of nitrogen in the reactants and 2 in the products. This is in line with the Law of Conservation of Mass. 

82.
 Fill in the blank to balance the chemical equation. 
2KI  +  ____Cl2 →  2KCl  +  I2
a)
1
b)
2
c)
3
d)
4
83.
What coefficient should go in the blank space to balance the chemical equation? 
2Al  +____  HCl   →    2AlCl3  +  3H2
a)
2
b)
4
c)
3
d)
6
84.

Combustion is an .................Process

a)

Endothermic

b)

Exothermic

c)

Both (a) and (b)

d)

None of the above

85.

A chemical reaction that absorbs energy in the form of heat is described as

a)

endothermic

b)

exothermic

c)

combustion

d)

unbalanced

86.

The principle of conservation of mass is true

a)

only for reactions that take place in open systems

b)

only for reactions that take place in closed systems

c)

for reactions in both open and closed systems

d)

for no reaction at all

87.
What are atoms?
a)
The basic building blocks of all matter
b)
One of the phases of matter
c)
They travel in energy
d)
They are radiated from the sun
88.
Which subatomic particle is inside the nucleus of an atom and has a positive charge?
a)
Proton
b)
Electron
c)
Neutrophil
89.
Which subatomic particle is inside the nucleus of an atom and has a positive charge?
a)
Proton
b)
Electron
c)
Neutrophil
90.
Which subatomic particle is inside the nucleus of an atom and has no charge?
a)
Proton
b)
Electron
c)
Neutron
d)
Neutrophil
91.
Which subatomic particle travels outside of the nucleus of an atom and has a negative charge?
a)
Proton
b)
Neutron
c)
Electron
d)
Neutrophil
92.
Does an atom take up space and have mass?
a)
Yes
b)
No
93.
How many kinds of atoms are elements composed of?
a)
1
b)
2
c)
Hundreds
d)
Trillions
94.
When two or more atoms are combined chemically, they make what?
a)
Mixture
b)
Compound
c)
Solution
d)
Vapor
95.
When two or more different substances are physically combined, they form what?
a)
Compound
b)
Mixture
c)
Solution
d)
Vapor
96.
In a heterogeneous mixtures, particles are easily seen.
a)
True
b)
False
97.
What type of mixture is it difficult to separate and to view the individual substances?
a)
Heterogeneous
b)
Homogeneous
c)
Heterozygous
d)
Homozygous
98.
What are the three states of matter?
a)
Vapor, Liquid, Steam
b)
Liquid, Ice, Solid
c)
Solid, Liquid, Gas
99.
In a solid, the molecules?
a)
Move freely
b)
Do not move
c)
Move slightly
100.
In a liquid, the molecules?
a)
Do not move
b)
Will fill the shape of a container
101.
In a gas, the molecules?
a)
Do not move
b)
Move easily
102.

Which best represents a compound?

a)
b)
c)
d)
103.

Which best compares a homogeneous mixture and a heterogeneous mixture?

a)

Homogeneous mixtures are formed through physical changes, while heterogeneous mixtures are formed through chemical changes.

b)

Homogeneous mixtures are composed of two different liquids, while heterogeneous mixtures are composed of a solid and a liquid.

c)

The particles in a homogeneous mixture will separate if left undisturbed, while the particles in a heterogeneous mixture cannot be filtered out of the mixture.

d)

A homogenous mixture is the same throughout, while a heterogeneous mixture is not uniform throughout.

104.

Which is an example of a compound?

a)

O2

b)

2Cl

c)

H2SO4

d)

Hydrogen

105.

Which pair of elements has the most similar properties?

a)

Li and B

b)

I and Ca

c)

K and He

d)

N and P

106.

Why are the noble gases such as helium (He) and neon (Ne) grouped together in the periodic table?

a)

They are nonreactive gases.

b)

They are highly reactive metallic solids.

c)

They are dangerous gases when combined with water.

d)

They are liquid at room temperature and have high boiling points.

107.

What category of elements is found between the metals and nonmetals on the periodic table?

a)

synthetic

b)

metalloids

c)

radioactive

d)

noble gases

108.

Properties such as magnetism, luster (shine), and malleability have been used to group together which category of elements on the periodic table?

a)

metals

b)

nonmetals

c)

metalloids

d)

noble gases

109.

What happens to water molecules during the boiling process?

a)

They move faster and move farther apart as they absorb heat.

b)

They move faster and remain close together as they absorb heat.

c)

They move more slowly but move farther apart as they lose heat.

d)

They move faster and move farther apart as they lose heat.

110.

Which shows one example of a physical change and one example of a chemical change?

a)

boiling water and melting wax

b)

rusting iron and baking a cake

c)

dissolving powder and shredding paper

d)

freezing water and burning coal

111.

Which is the best evidence that the creation of a precipitate is the result of a chemical reaction?

a)

demonstrates gas production

b)

demonstrates a temperature change

c)

demonstrates a new substance has formed

d)

None of the above provide evidence of a chemical change.

112.

If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products?

a)

12 atoms of carbon (C)

b)

6 atoms of carbon (C)

c)

3 atoms of carbon (C)

d)

2 atoms of carbon (C)

113.

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

a)

During a chemical reaction, the total amount of matter stays the same.

b)

During a chemical reaction, matter is destroyed.

c)

During a chemical reaction, one or more new substances are formed.

d)

During a chemical reaction, the total number of atoms increases.

114.

When wood is burned, it is changed into ash and carbon is released into the atmosphere as smoke. If 2 kg of wood were burned, how much ash would result?

a)

exactly 2 kg because mass is conserved in this system

b)

less than 2 kg because some of the mass is lost as gas

c)

greater than 2 kg because carbon is added to the system

d)

greater than 2 kg because carbon is added to the system

115.

A compound containing potassium (K), chlorine (Cl), and oxygen (O) has the chemical formula KClO . Which best represents a balanced chemical reaction showing the breakdown of KClO into simpler substances?

a)

2KClO3 → 2KCl

b)

2KClO3 → Cl2 + 3O2

c)

2KClO3 → 2K + 3O2

d)

2KClO3 → 2KCl + 3O2

116.

A researcher combines 37 grams of iron with 16 grams of oxygen. Based on the Law of Conservation of Mass, what will be the resulting mass of the product?

a)

16 grams

b)

21 grams

c)

37 grams

d)

53 grams

117.

The vertical (up and down) columns in the Periodic Table are called

a)

groups

b)

towers

c)

periods

d)

atomic numbers

118.

The vertical (up and down) columns in the Periodic Table are called

a)

groups

b)

towers

c)

periods

d)

atomic numbers

119.
The Modern Periodic Table of Elements is arranged by
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
120.
Which group of the periodic table is composed of inert (not reactive)  gases?
a)
alkali metals
b)
alkaline earth metals
c)
halogens
d)
noble gases
121.
Which is an alkali metal?
a)
Magnesium
b)
Iron
c)
Sodium
d)
Europium
122.
Which is a halogen?
a)
Helium
b)
Chlorine
c)
Oxygen
d)
Neptune
123.
Elements in a ..................have similar chemical properties.  
a)
period
b)
group
c)
row
124.

The letter, C, is a ... of carbon.

a)

Name

b)

Nickname

c)

Chemical Symbol

d)

Pseudonym

125.

Which of the following are physical properties of metal?

a)

Luster

b)

Conductivity

c)

Malleability

d)

Ductility

126.

True or False: The reactivity of metals tends to decrease as you move from left to right across the periodic table.

a)

True

b)

False

127.

Name this group: These metals are the most reactive.

a)
b)
c)
d)
128.

Name this group: These metals are the second most reactive.

a)
b)
c)
d)
129.

Name this group: These metals are the second most reactive.

a)
b)
c)
d)
130.

Name this group: These metals contain familiar metals such as gold, iron, and copper.

a)
b)
c)
d)
131.

Name this group: These metals, located near the nonmetals, are never found uncombined in nature.

a)
b)
c)
d)
132.

Find these groups: Locate Lanthanides and Actinides.

a)
b)
c)
d)
133.

Which of the following could be properties of nonmetals?

a)

Poor electrical conductivity

b)

Poor thermal conductivity

c)

Dullness

d)

Brittleness

134.

I am a metal


I am in group 2


I am in period 6


I am…

a)

Mo

b)

Re

c)

S

d)

Ba

135.

I am a nonmetal


I am in period 2


I am in group 16/6A

a)

Ba

b)

Si

c)

Ba

d)

O

136.

Find an element with similar chemical properties to Barium (Ba).

a)

Ca an Ra, because they are in the same group and have similar chemical properties.

b)

Cs and La, b/c they are in the same period number.

c)

Ca and Y, b/c they are 90 degree angle and have similiar properties.

137.
What is the atomic number of this element?
a)
4
b)
80
c)
79
d)
8
138.
What element primarily makes a diamond?
a)
Hydrogen
b)
Silver
c)
Carbon
d)
Calcium
139.
What is the symbol for Potassium?
a)
P
b)
K
c)
Pb
d)
Pd
140.
What is the symbol for Carbon?
a)
C
b)
Ca
c)
Cl
d)
H
141.
What is the name of this element?
a)
Helium
b)
Rubidium
c)
Hydrogen
d)
Mercury
142.
Which one of these is not a noble gas?
a)
Helium
b)
Radon
c)
Iodine
d)
Krypton
143.
What is the atomic number of Rubidium?
a)
37
b)
44
c)
45
d)
86
144.
What is the atomic number of Oxygen?
a)
6
b)
7
c)
8
d)
9
145.
Which one of these is the symbol for lead?
a)
Rb
b)
Pb
c)
Li
d)
Au
146.
Which one of these elements is found in electrical cord?
a)
Cu
b)
H
c)
Kr
d)
Br
147.
What family is Sodium a part of?
a)
Transition Metals
b)
Halogens
c)
Alkali Metals
d)
Alkaline Earth Metals
148.
What two elements come together to make this substance in the picture?
a)
Oxygen and Carbon
b)
Sodium and Calcium
c)
Sodium and Chlorine
d)
Helium and Nitrogen
149.
If you were working out you would be "pumping _______."
a)
I
b)
Fe
c)
Mg
d)
Y
150.
What family is silver a part of?
a)
Transition Metals
b)
Noble Gases
c)
Alkali Metals
d)
Alkaline Earth Metals
151.
What family is Cadmium a part of?
a)
Noble Gases
b)
Metalloids
c)
Transition Metals
d)
Actinoids
152.
Silicon is a 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Halogen
153.
__________ would have some characteristics of metals and some characteristics of nonmetals.
a)
Gold
b)
Sodium
c)
Arsenic
d)
Bismuth
154.
___________ is the only metal that is a liquid at room temperature.
a)
Platinum
b)
Water
c)
Tin
d)
Mercury
155.
Which element that starts with a B is an Alkaline Earth Metal?
a)
Barium
b)
Boron
c)
Bread
d)
Bromine
156.
What element is this?
a)
Silver
b)
Silicon
c)
Sulfur
d)
Selenium
157.

What is the left part of a chemical equation called?

2H2 + O2 ---> 2H2O

a)

Reactants

b)

Yields

c)

Products

d)

Chemical equation

158.

What is the right part of a chemical equation called?

2H2 + O2 ---> 2H2O

a)

Reactants

b)

Yields

c)

Products

d)

Chemical Equation

159.

What is the total number of atoms present in 5Na3PO4?

a)

5

b)

55

c)

40

d)

8

160.

How many Mn atoms are found in the following compound?

2MnO4

a)

1

b)

2

c)

4

d)

8

161.

What is the little number after an element in a chemical equation called?

Example: H2

a)

Coefficient

b)

Atom

c)

Subscript

d)

Equation

162.

Is the following equation balanced?

Al + O2 ---> 2Al2O3

a)

YES

b)

NO

163.

What is the number before a chemical formula called?

Example: 2H2 + O2 ---> 2H2O

a)

Coefficient

b)

Atom

c)

Subscript

d)

Equation

164.

How many elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

165.

Which of the following equations are correctly balanced?

a)

12CO2 + H2O ---> C6H12O6 + O2

b)

CO2 + H2O ---> 3C6H12O6 + O2

c)

CO2 + 9H2O ---> C6H12O6 + O2

d)

6CO2 + 6H2O ---> C6H12O6 + 6O2

166.

Balance this equation:

H2 + Cl2 ---> HCl

a)

It is balanced.

b)

H2 + Cl2 ---> 2HCl

c)

3H2 + Cl2 ---> 6HCl

d)

H2 + 3Cl2 ---> 6HCl

167.

Balance this equation:

HgO ---> 2Hg + O2

a)

It is balanced.

b)

2HgO ---> 2Hg + O2

c)

2HgO ---> Hg + O2

d)

HgO ---> Hg + 2O2

168.

Complete the sentence.


During a chemical reaction, atoms ________.

a)

can appear

b)

can disappear

c)

get rearranged

d)

stop moving and vibrating

169.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number in front of a chemical formula.
c)
The number in between the chemical symbols.
d)
The number behind a chemical formula.
170.

What is the Law of Conservation of Mass?

a)

It states that matter cannot be created or destroyed.

b)

It states that energy cannot be created or destroyed.

c)

It states that matter can be created or destroyed.

d)

It states that sound can be created or destroyed.

171.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
172.
What are the smaller numbers that you CANNOT change in a chemical equation? 
a)
Coefficient
b)
Products
c)
Reactants
d)
Subscript
173.

Balance the following equation:

___ H2+ ___ O2→___ H2O

a)

1, 1, 3

b)

2, 2, 2

c)

1, 2, 1

d)

2,1, 2

174.

Who created the periodic table of elements?

a)

John Dalton

b)

Hennig Brand

c)

Antoine Lavoisier

d)

Dmitri Mendeleev

175.

An element is identified by

a)

its number of protons.

b)

the atomic mass.

c)

the type of charge.

d)

its number of isotopes.

176.

Each of the elements in the periodic table has a specific number. What does this number represent?

a)

the half-life

b)

the number of neutrons

c)

the number of protons

d)

the number of isotopes

177.

The number of protons and neutrons in the atom is its

a)

atomic mass.

b)

atomic number.

c)

atomic power.

d)

atomic clock.

178.

The element sodium appears like this in the periodic table. Which is its chemical symbol?

a)

11

b)

Na

c)

sodium

d)

22.990

179.

The chemical formula for baking soda is NaHCO3. How many different elements make up baking soda?

a)

1

b)

2

c)

3

d)

4

180.

How are elements ordered in the modern periodic table?

a)

by date of discovery

b)

by decreasing atomic mass

c)

by increasing atomic number

d)

by alphabetical order of element symbols

181.

The periodic table contains rows and columns. What are the horizon rows called?

a)

groups

b)

families

c)

columns

d)

periods

182.

How many periods does the periodic table contain?

a)

7

b)

8

c)

9

d)

10

183.

What are the columns of the periodic table called?

a)

periods

b)

rows

c)

tables

d)

groups or families

184.

How many groups does the periodic table contain?

a)

2

b)

3

c)

18

d)

32

185.

Properties such as magnetism, luster, and malleability have been used to group together which category of elements on the periodic table?

a)

metals

b)

nonmetals

c)

metaloids

d)

noble gases

186.

What general category describes the majority of the elements in the periodic chart?

a)

metals

b)

liquids

c)

nonmetals

d)

gases

187.

If a highly-reactive metal with one valence electron is discovered, in which group would the element best fit?

a)

group 1

b)

group 2

c)

group 17

d)

group 18

188.

Electrons located in an atom's outer most electron shell.

a)

electrolysis

b)

valence electrons

c)

electronics

d)

election

189.

Which statement best explains how periods on the periodic table are organized?

a)

increasing atomic number from left to right

b)

increasing number of neutrons from left to right

c)

decreasing number of electrons from left to right

d)

decreasing atomic mass number from left to right

190.

In which groups did Mendeleev most likely place highly-reactive elements?

a)

group 1 (IA) and group 17 (VIIA)

b)

group 1 (IA) and group 18 (VIIIA)

c)

group 2 (IIA) and group 18 (VIIIA)

191.

Which best explains how the periodic table is used to identify properties of elements?

a)

by the color and shape of the elements

b)

by the number of electrons in the elements

c)

by the group in which the elements are located

192.

An engineer needs a hard, non-magnetic semiconductor. Which element would best fit this description?

a)

aluminum (Al)

b)

carbon (C)

c)

silicon (Si)

d)

silver (Ag)

193.

Why does reactivity in non-metals most likely increase from left to right in the periodic table?

a)

atomic radius increases

b)

attraction for electrons increase

c)

attraction for electrons decreases

Similar Resources on Wayground

G8 Q2 FINAL EXAM REVISION

189 questions

G8 Q2 FINAL EXAM REVISION

quiz

Worksheet

•

8th Grade

Summer Term Science Revision Practice

191 questions

Summer Term Science Revision Practice

quiz

Worksheet

•

6th - 9th Grade

8th grade CBA #1 review

190 questions

8th grade CBA #1 review

quiz

Worksheet

•

6th - 9th Grade

Exploration of Power and Energy Sem Exam Review 2

196 questions

Exploration of Power and Energy Sem Exam Review 2

quiz

Worksheet

•

6th - 12th Grade

osn fisika

191 questions

osn fisika

quiz

Worksheet

•

6th - 8th Grade