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Worksheets

Chemical Science

Total questions: 140

Worksheet time: 2hrs 19mins

Name
Class
Date
1.
A vertical column is called...
a)
group
b)
tower
c)
period
d)
crew
2.
The number at the bottom of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
chemical symbol
d)
element name
3.
The number at the top of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
Chemical Symbol
d)
Element Name
4.
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
5.
What is the atomic mass equal to?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
6.
What does the 6 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
7.
What does 12.011 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
8.

What are valence electrons?

a)

Any of an atom's electrons

b)

Electrons located on the first energy level

c)

Electrons not attached to any atom

d)

electrons located on the outer energy level

9.

what is the biggest group on the table

a)

metals

b)

nonmetals

c)

metaloids

d)

halogens

10.

how many rows are on the table

a)

4

b)

5

c)

6

d)

7

11.

how many groups/families are on the table

a)

15

b)

16

c)

17

d)

18

12.
The horizontal row on the periodic table is called a
a)
group
b)
family
c)
period
d)
atomic number
13.

Who invented the Periodic Table?

a)

Mendeleev

b)

Bohr

c)

Lewis

d)

Democritus

14.

As you move left to right on a row or period what happens?

a)

Atomic number increases by 1

b)

Electrons decrease

c)

Number of shells decrease

d)

Nothing

15.

What happens to the number of shells as you move down a group?

a)

They decrease by 1

b)

They increase by 1

c)

Nothing

16.

Valence means......

a)

inside

b)

outside

c)

full

17.

We use M.A.N. to find the number of .....

a)

Protons

b)

Electrons

c)

Neutrons

d)

Shells

18.

A.P.E. tells us the number of Protons & Neutrons.

a)

True

b)

False

19.

What do all elements in the same period have?

a)

same number of shells

b)

same number of electrons

c)

belong in the same family

20.
The central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
21.
An atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
22.
Most of the mass in an atom is concentrated in the...
a)
electrons
b)
nucleus
c)
protons
d)
empty space
23.
What does the nucleus consist of?
a)
Protons + Electrons
b)
Neutrons + Electrons
c)
Atoms
d)
Protons + Neutrons
24.
The part of the atom that is moving around the nucleus is called?
a)
electron
b)
neutron
c)
proton
25.

What is the smallest piece of matter that still has properties of that matter?

a)

element

b)

atom

c)

proton

26.

Negatively charged particle

a)

proton

b)

neutron

c)

electron

27.

Neutral charge particle

a)

proton

b)

neutron

c)

electron

28.

Positively charge particle

a)

proton

b)

neutron

c)

electron

29.

What do protons, electrons and neutrons make?

a)

element

b)

compound

c)

atom

30.
What is the atomic number for an element with twelve protons?
a)
2
b)
12
c)
24
d)
6
31.
_____ - made up of two or more elements.
a)
Element
b)
Compound
32.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
33.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
34.
  What is a pure substance made of two or more elements that are chemically combined called?
a)
A. element
b)
B. compound     
c)
C. mixture
d)
D. solution
35.

The word "periodic" means

a)

repeating

b)

Grouping

c)

ordering

36.

what does an Atomic number tells you?

a)

Number of neutrons in nuclei

b)

Number of protons in nuclei

c)

Number of electrons

37.

Elements which are shiny, can be bent, conduct electricity and heat are called

a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
38.

Which one will glow if an electric current is passed through them?

a)

Metal

b)

Non-metal

c)

Metalloid

d)

Noble gas

39.

Elements in the same group or family have __________

a)

Similar physical and chemical Properties

b)

Same number of shells

c)

Similar Mass

40.

How many known elements are there?

a)

116

b)

118

c)

106

d)

108

41.

Semimetals (Metalloids) have the properties of

a)

metals

b)

non-metals

c)

metals and non-metals

42.

An atom that gains or loses an electron becomes

a)

an isotope

b)

a new element

c)

an ion

d)

a molecule

43.

How many different elements are in the C6H12O6

a)

3

b)

6

c)

12

d)

24

44.
Chemical bonds form when atoms
a)
combined nuclei
b)
give up neutrons
c)
gain protons
d)
share or transfer electrons
45.

What is an element molecule?

a)

When different atoms are bonded together

b)

When the same two atoms are bonded together

c)

When three or four atoms are bonded together

d)

When atoms share protons.

46.

What is a compound molecule?

a)

When the same two atoms bond together

b)

When different atoms bond together

c)

When molecules make a compound structure

d)

When several atoms don't do their homework

47.

What part of the atom makes a bond?

a)

Electrons

b)

Protons

c)

Neutrons

d)

Any subatomic particle

48.

Hydrogen atoms come together to form a _________________

a)

Dancing bear

b)

Hydrogen molecule

c)

Carina molecule

d)

Artemis molecule

49.

What is the octet rule?

a)

Elements just are

b)

Elements keep electrons to make changes

c)

Elements keep electrons to stay the same

d)

Elements gain or lose electrons to fill their outer shell with 8 electrons

50.

Why do elements want to bond?

a)

Because bonding is super cool.

b)

Only nerdy elements need bonding

c)

To be like the noble gases which are stable with full valence elecron shells.

d)

This is a hard question, Ms. Hunt

51.

Is H2O2 an element or a compound?

a)

element

b)

compound

52.

Which type of bonds create compounds?

a)

covalent bonds

b)

ionic bonds

c)

metallic bonds

d)

all type of bonds

53.

How many total atoms are in C6H1206

a)

3

b)

6

c)

12

d)

24

54.

Are the atoms more stable when they are bonded together or when they are apart?

a)

Bonded Together

b)

Apart

55.

Ionic Bonding involves:

a)

The transfer of protons

b)

The transfer of neutrons

c)

The transfer of electrons

d)

None Of the above

56.

What do atoms that form positive ions tend to do?

a)

Tend to lose electrons

b)

Tend to lose protons

c)

Tend to gain electrons

d)

Tend to gain protons

57.

What usually forms the positive ion?

a)

Metal

b)

Nonmetals

c)

None

58.

What usually forms the negative ion?

a)

Nonmetals

b)

Metal

c)

None

59.

Covalent compounds:

a)

Share electrons

b)

Transfer electrons

c)

Neither

60.

What charges attract?

a)

Opposite

b)

Same

61.

What charges repel?

a)

Same

b)

Opposite

62.

What elements generally make an ionic bond?

a)

metal and nonmetal

b)

2 or more nonmetals

c)

metal

d)

none of the above

63.

What is the number of valence electrons for Calcium (Group 2)?

a)

1

b)

2

c)

3

d)

4

64.

What is the number of valence electrons for Carbon (Group 14)?

a)

1

b)

2

c)

3

d)

4

65.

What is the number of valence electrons for Neon and the other Noble Gases?

a)

5

b)

6

c)

7

d)

8

66.

If an atom transfers an electron to another atom, those atoms form which bond?

a)

Ionic Bond, which is stronger than a covalent bonds

b)

Covalent Bond, which is stronger than ionic bonds

67.

If I was trying to determine if two atoms will bond, what would be helpful to know:

a)

Valence electrons, found by group number

b)

Whether the elements are metals or nonmetals

c)

The electronegativity of the atoms

d)

All of the above, all of which can be found on the Periodic Table

68.

Mendeleev could able to predict scientists would discover more elements in future.

a)

True

b)

False

69.

The Modern Periodic Table of Elements are arranged by

a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
70.
The atoms along the staircase are called 
a)
metals
b)
nonmetals
c)

semimetals/metalloids

d)
noble gases
71.

If you know the atomic number of an element, you will know the element's

a)

number of protons

b)

number of neutrons

c)

number of electrons

d)

mass number

72.

Which two elements are liquids at room temperature?

a)

Molybdenum and Bohrium

b)

Mercury and Bromine

c)

Germanium and Iodine

73.

Which are TRUE about Molecules?

a)

A molecule is a group of two or more atoms that are chemically joined.

b)

Each molecule act as a single unit.

c)

Size of the molecule can be small or big

74.

Atoms give-up their outermost loose electron to become

a)

positively charged Cations

b)

negatively charged Anions

c)

positively charged Anions

d)

Negatively charged Cations

75.

Atoms of the same element that have a different number of neutrons are called

a)

Molecular compound

b)

Isotopes

c)

Mixtures

76.

The lowest energy levels are the rings __________ to the nucleus and can hold up to ______ electrons.

a)

farthest, 8

b)

closest, 2

c)

closest, 8

d)

farthest ,2

77.
In a ___________change, a substance changes into a different substance.
a)
Physical
b)
Chemical
78.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
79.
What type of change occurs when a new substance is formed that has different properties from the original substances?
a)
chemical change
b)
nuclear change
c)
physical change
d)
mutation
80.
Which of the following is an example of a chemical change?
a)
rusting of a bicycle
b)
painting a house
c)
washing a dog
d)
tearing up a newspaper
81.

What is the BEST definition of a chemical reaction?

a)

A change in matter that produces one or more NEW substances

b)

When two things combine and EXPLODE.

82.

A substance that is formed as the result of a chemical reaction is a __________________

a)

Product

b)

Reactant

c)

Starters

d)

Enders

83.

Which of the following is an example of a chemical change?

a)

water freezes to form ice

b)

sugar dissolves in water

c)

gasoline burns in a car engine

d)

a piece of metal expands when it is heated

84.

A change in the shape of an object is an example of _________________.

a)

a chemical change

b)

energy

c)

an endothermic change

d)

a physical change

85.

Which one shows that a chemical reaction has occurred?

a)

dissolving

b)

melting

c)

formation of a gas

d)

bending

86.

A chemical change is different than a physical change because in a chemical change

a)

chemicals are used

b)

molecules do not physically touch

c)

a new substance is formed and in a physical no new substance is formed

d)

the change can be seen but in a physical change it cannot

87.

Which of the following 2 are chemical reactions?

a)

sugar dissolving in water

b)

water turning into steam

c)

burning wood

d)

mixing baking soda and vinegar

e)

tearing paper

88.

Why are chemical equations always balanced? Select ALL that apply.

a)

Matter cannot be created.

b)

Matter cannot be destroyed.

c)

Matter can only be rearranged/conserved.

d)

Matter doesn't matter.

89.

In a chemical reaction, if the reactants are heated, the reaction usually happens

a)

slower

b)

faster

c)

at the same rate

d)

in a smaller volume

90.

Which of the following is a common sign that a chemical change has occurred?

a)

A chemical has turned a different color, bubbled, and/or changed temperature.

b)

A chemical has changed to a different state of matter, such as a liquid to a solid.

c)

A chemical has changed size.

d)

A chemical has become a different shape.

91.
Which observation(s) might be used as evidence that a chemical reaction occurred?
a)
Color change
b)
Odor change
c)
Properties change
d)
All of the above
92.
_________ is (are) made of more than one atom.
a)
A molecule
b)
Protons
c)
Neutrons
d)
An element
93.
________ result(s) in no new substances.
a)
A physical change
b)
A chemical change
c)
Physical and chemical changes
d)
None of the above
94.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
95.

In chemical reactions, what does the Law of Conservation of Matter mean?

a)

Matter is not created or destroyed.

b)

The total mass of the reactants is greater than the total mass of the products.

c)

The total mass of the reactants is less than the total mass of the products.

d)

Matter is not changed.

96.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
97.
The substances listed on the right side of a chemical equation are the
a)
Yields
b)
Reactants
c)
Products
d)
Precipitates
98.
Digesting your food is an example of 
a)
chemical change
b)
physical change
99.

CH2Cu8 - How many Copper atoms are in this formula?

a)

1

b)

2

c)

8

d)

16

100.

What is the coefficient for this formula? 9NaCl2

a)

9

b)

2

c)

1

d)

11

101.

This tells you how many atoms of an element you have in a chemical formula

a)

coefficient

b)

subscript

c)

chemical symbol

d)

atomic number

102.

This tells you the number of molecules you have of a substance

a)

coefficient

b)

subscript

c)

exponent

d)

chemical formula

103.

Is this equation balanced?

2H2O yields H2 + 2O2

a)

Yes

b)

No

104.

This equation is not balanced. Which element has more atoms on one side than the other?

2HCl + CaCO3 yields CaCl + H2O + CO2

a)

Cl

b)

Ca

c)

H

d)

O

105.

Is this equation balanced?

C + 2H2 yields CH4

a)

No

b)

Yes

106.

How many total atoms are in this formula? 3Zn2O3H

a)

6

b)

9

c)

18

107.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
108.

How many elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

109.

Which of the following could be an organic compound? Hint: organic means it contains Carbon!

a)

NH3

b)

H2O

c)

CaCl2

d)

CH4

110.

Which of the following chemical equations follows the Law of Conservation of Mass? Hint: which is balanced?

a)

CO2 + H2O --> C6H12O6 + O2

b)

C6O + H12O --> C6H12O2

c)

CO2 + H2O --> C6H12O6 + O2

d)

CO2 +H2O --> C6H12O6 +O2

111.

Al2

a)

A single atom

b)

Elemental Molecule

c)

Compound Molecule

d)

None of these

112.

Does this follow the Law of Conservation of Mass? (is it balanced?)

Mg + Cl2 --> MgCl2

a)

No

b)

Yes

113.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
114.

Which of the following is a physical change?

a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
115.

What happens in a Chemical Reaction?

a)

a) Chemical bonds are formed

b)

b) Chemical bonds are broken

c)

both a & b

d)

None

116.

How many Carbons are present on the reactant side?

a)

1

b)

2

c)

3

d)

4

117.
What is the best definition for molecule? 
a)
A molecule is formed when two or more atoms join together chemically.
b)
A molecule is made of only one atom. 
118.
What is the best formula for this molecule?
a)
2H2O
b)
H3O
c)
H2O2
d)
H2O
119.
Choose the correct statement.
a)
Atoms are the biggest particle in a element.
b)
Atoms are the smallest particle in a molecule.
c)
Atom is the smallest particle in a element.
d)
Atoms are nice.
120.
What is the total number of atoms in this molecule?
a)
2
b)
4
c)
1
d)
6
121.

How many atoms are represented in the reactants of this equation?

a)

6

b)

12

c)

24

d)

36

122.

How many Oxygens are on the product side of this chemical equation?

a)

1

b)

2

c)

3

d)

4

123.
Two or more substances blended together, keeping their own properties and not turning into a new substance defines a ___________.
a)
Suspension 
b)
Mixture
c)
Solution 
d)
Filter 
124.
A mixture in which substances are completely blended or dissolved and cannot be separated defines a _________________. 
a)
Solution
b)
Mixture
c)
Suspension 
d)
Filter 
125.
Mixtures an be easily separated by observable properties such as particle size, shape, and magnetic attraction. 
a)
True
b)
False
126.
__________ are made up of solutes and solvents.
a)
Solutions
b)
Suspension
c)
Colloid
d)
mixtures
127.

Alloy is a ...

a)

A chemical compound with combination between metal and non-metal

b)

A salt contain of two or more elements where the main element is non-metal

c)

Mixture of two or more elements where the main element is metal

128.
Which is an example of a solute?
a)
Egg whites
b)
Sugar
c)
Water
d)
Acetone
129.
Which is an example of a solvent?
a)
Salt
b)
Egg whites
c)
Water
d)
Sugar
130.

What is a solvent

a)

A liquid that will dissolve a solid solute

b)

Another word for solution

c)

A thing that make drinks change colour

d)

Usually the solid about to be dissolved

131.

The substance being dissolved in a solution is the?

a)

solution

b)

solute

c)

solvent

d)

mixture

132.

Which one loses its identifying characteristics 

a)
Mixture
b)
Solution 
133.

Which one does not lose its identifying characteristics 

a)
Mixture
b)
Solution 
134.

As temperature increases, what happens to particles?

a)

They speed up

b)

They slow down

135.

What is happening in this picture of ice melting?

a)

Molecules are speeding up

b)

Molecules are slowing down

136.

What is happening in this picture of water boiling?

a)

Molecules are speeding up

b)

Molecules are slowing down

137.
Sublimation is
a)
when solid turns into gas
b)
when gas turns into plasma
c)
when liquid turns into gas
d)
when gas turns into solid
138.

Condensation

a)

A gas changes into a liquid

b)

A liquid changes into a gas

c)

A solid changes into a liquid

d)

A liquid changes into a solid

139.

Evaporation

a)

A gas changes into a liquid

b)

A solid changes into a liquid

c)

A liquid changes into a gas

d)

A liquid changes into a solid

140.

Solubility depends on

a)

Temperature of solute

b)

pressure & concentration of solvent

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