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Unit Review - Chemistry Part 2

Total questions: 115

Worksheet time: 6hrs 45mins

Name
Class
Date
1.

1 .) The atoms of a certain element each contain 10 protons and 8 valence electron.


Which statement correctly identifies this element and describes its chemical reactivity?

a)

A The element is Neon, and it is highly reactive.

b)

B The element is fluorine, and it is not very reactive.

c)

C The element is Neon, and it is not very reactive.

d)

D The element is fluorine, and it is highly reactive.

2.

2.) Which types of elements have a full outer shell of Valence Electrons?

a)

F Metals

b)

G Noble Gases

c)

H Metalloids

d)

J Non-Metals

3.

3.) How many protons are contained in the nucleus of a Fluorine atom?

a)

A 18

b)

B 9

c)

C 36

d)

D 40

4.

4.) How are the three elements above organized on the periodic table?

a)

F Niobium and Cobalt are in the same period.

b)

G Cobalt and Scandium are in the same period.

c)

H Cobalt and Scandium are in the same group.

d)

J Niobium and Cobalt are in the same group.

5.

5.) How many valence electrons are in an atom of each element in Group 14 in the

periodic table?

a)

14

b)

4

c)

2

d)

6

6.

6.) Which of the following lists all the elements that are present in a molecule of

potassium carbonate, Ca₃(PO₄)₂ ?

a)

F carbon and oxygen

b)

G phosphate and calcium

c)

H calcium, phosphorus, and oxygen

d)

J potassium, carbon, and oxygen

7.

7.) The formula for baking soda is given.


KMnO₄


This formula indicates that the most basic unit of baking soda contains —

a)

A 1 magnesium atom, 1 potassium atom, and 3 oxygen atoms

b)

B 1 potassium atom, 1 magnesium atom, and 4 oxygen atoms atom

c)

C 1 potassium atom, 1 helium atom, and 1 oxygen atom

d)

D 1 carbon atom, 1 helium atom, 1 calcium atom, and 3 oxygen atoms

8.

10.) Which diagram correctly shows the charges of the particles in a neutral beryllium

atom?

a)
b)
c)
d)
9.

How is the atomic mass of an element determined?

a)

subtracting the protons and the average number of electrons

b)

subtracting the protons and the average number of neutrons

c)

adding the protons and the average number of neutrons

d)

adding the protons and the average number of electrons

10.

What is the atomic number of this atom?

a)

2

b)

4

c)

6

d)

none of the above

11.

How many valence electrons does this atom have?

a)

1

b)

2

c)

3

d)

4

12.

Which of the following statements about valence electrons is true?

a)

determine the charge of an atom

b)

determine the atomic mass of an atom

c)

determine which elements are likely to join into compounds with one another.

d)

determine the period on the periodic table where you will find an element.

13.

The elements along the staircase on the periodic table are called:

a)

metals

b)

nonmetals

c)

metalloids

d)

noble gases

14.

How many valence electrons are the first 20 elements on the periodic table trying to reach in their outer shells?

a)

1

b)

2

c)

5

d)

8

15.

What determines the reactivity - or ability to form compounds -- of an element?

a)

Size of its nucleus

b)

Number of total electrons

c)

Number of valence electrons

d)

Number of shells

16.
How do you determine the number of valence electrons an element has?
a)
Look at its period
b)
Look at its group
c)
Look at its atomic number
d)
Look at its atomic mass
17.

Changes in a material's state of matter -- solid-liquid-gas -- is an example of a:

a)

physical change

b)

chemical change

18.

What subatomic particle has a negative charge and is found outside of the nucleus?

a)

Electron

b)

Proton

c)

Nucleus

d)

Neutron

19.

Which subatomic particle has a positive charge and is found inside the nucleus?

a)

Electron

b)

Proton

c)

Neutron

d)

Nucleus

20.

Which subatomic particle has a neutral charge and is found inside the nucleus?

a)

Electrons

b)

Protons

c)

Neutrons

d)

Nucleus

21.

What is the smallest unit of matter that still has the properties of an element?

a)

Atom

b)

Proton

c)

Neutron

d)

Electron

22.

The value representing the number of protons in an element is called the:

a)

Atomic Mass

b)

Mass Number

c)

Valence Electrons

d)

Atomic Number

23.

Arrangement of elements organized by atomic number

a)

Electron Cloud

b)

Periodic Table

c)

Electron Configuration

d)

None of these

24.

How many protons does Helium (He) have?

a)

1

b)

2

c)

3

d)

4

25.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
26.

Which subatomic particles contribute the most to the mass of an atom?

a)

Protons, Neutrons, Electrons

b)

Protons only

c)

Protons and Electrons

d)

Protons and Neutrons

27.

How many electrons does a sodium atom have?

a)

23

b)

11

c)

12

d)

34

28.
Atoms of the same element must always have the same number of _________
a)
electrons
b)
neutrons
c)
isotopes
d)
protons
29.
What are subatomic particles? 
a)
the nucleus 
b)
electron cloud
c)
positive charge
d)
electrons, protons, and neutrons
30.

How many electrons can the first shell of any element hold?

a)

1

b)

2

c)

4

d)

8

31.

How many electrons can the 2nd energy level of any element hold?

a)

1

b)

2

c)

4

d)

8

32.

a row on the Periodic Table of Elements

a)

family

b)

period

c)

row

d)

isotope

33.

The vertical columns of the periodic table are called...

a)

Periods

b)

Families

c)

Chemical Symbols

d)

Groups

34.
Which is an electron?
a)
A
b)
B
c)
C
35.
Which is a proton?
a)
A
b)
B
c)
C
36.

Group 2, Period 3

a)

Sodium

b)

Beryllium

c)

Magnesium

d)

Calcium

37.

Group 18, Period 4

a)

Krypton

b)

Argon

c)

Radon

d)

Xenon

38.
Which of these is a property of metals?
a)
It's malleable
b)
It can't conduct electricity
c)
They are used in food
d)
It's very brittle
39.
Good conductor of heat
a)
Metal
b)
Nonmetal
40.
Iron is a good conductor, malleable and magnetic. What type of element is Iron? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
41.
Which of the following is a property of a non-metal?
a)
Conducts electricity and heats well
b)
Can be hammered into thin sheets
c)
Is brittle and breaks easily
d)
Has a shiny, metallic luster
42.
Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
43.
What is the chemical symbol for the element Silicon
a)
S
b)
Si
c)
si
d)
Sl
44.
What is the chemical symbol for the element Silver
a)
S
b)
Si
c)
Au
d)
Ag
45.

What is water (H2O)?

a)

Element

b)

Compound

c)

Mixture

46.

What is table salt (NaCl)?

a)

Element

b)

Compound

c)

Mixture

47.

What is salt water?

a)

Element

b)

Compound

c)

Mixture

48.

What is air?

a)

Element

b)

Compound

c)

Mixture

49.

What is a compound?

a)

A substance that is made up of one type of atom and can't be reduced to simpler substances.

b)

A substance made of two or more different atoms chemically bonded to one another. They can only be destroyed by chemical processes.

c)

A material containing two or more elements or compounds that are in close contact and are mixed in any proportion. They can be separated by physical means.

50.

What is an element?

a)

A substance that is made up of one type of atom and can't be reduced to simpler substances.

b)

A substance made of two or more different atoms chemically bonded to one another. They can only be destroyed by chemical processes.

c)

A material containing two or more elements or compounds that are in close contact and are mixed in any proportion. They can be separated by physical means.

51.

True or False: A compound like water has different physical properties to the elements that it is formed from.

a)

True

b)

False

52.
H2O2← ?
This number tells the number of atoms present.
a)
coefficient
b)
molecule
c)
subscript
d)
atom
53.

2H2O

How many Hydrogen atoms are present in this chemical formula?

a)

2

b)

4

c)

1

d)

10

54.

2H2O

How many Oxygen atoms are present in this chemical formula?

a)

2

b)

4

c)

1

d)

5

55.

2H2O

How many H2O molecules are present in this chemical formula?

a)

1

b)

4

c)

2

d)

8

56.

Mass, relative density, solubility, color, texture, state of matter, conductivity, are all examples of:

a)

Physical states of matter

b)

Chemical states of matter

c)

Physical properties of matter.

d)

Chemical properties of matter.

57.

Which of the following is a chemical property of matter?

a)

Magnetism

b)

Size

c)

Color

d)

Reactivity with water

58.
Which of the following examples shows that a chemical reaction has occurred? 
a)
A rock breaks into smaller pieces when it is struck with a hammer.
b)
Rust forms on a hammer that has been left outside to long. 
c)
A cup of water turns pink when a few drops of red food coloring are added. 
d)
A solid is formed when heat is removed from a sample of water. 
59.

What are the reactants in the following chemical reaction:


2Mg + O2 ---> 2MgO

a)

Mg and O

b)

MgO

c)

Mg and MgO

d)

O and MgO

60.
In a chemical reaction, everything to the right of the arrow is called ______________.
a)
Products
b)
Yields
c)
Molecules
d)
Reactants
61.
The substances at the beginning of a chemical equation are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
62.

How many iron (Ag) atoms are reactants in this equation?

4Ag + 3O2 → 2Ag2O

a)

4

b)

2

c)

3

d)

0

63.

In the following chemical reaction, methane and oxygen would be:


methane + oxygen turns into carbon dioxide + water

a)

reactants

b)

products

c)

neutrals

d)

energizers

64.
Which of the following is true about elements?
a)
All chemicals are elements.
b)
Elements are pure substances that can't be broken down.
c)
Elements can be broken down chemically or electrically.
d)
Elements are made of more than one substance.
65.
The compound H2SO4 has how many elements?
a)
3
b)
4
c)
6
d)
7
66.
An unknown element is non-malleable, non-lustrous, and non-conductive.  This element is a...
a)
metal
b)
metalloid
c)
non-metal
d)
undetermined
67.
Which of the following would you look for in a chemical change?
a)
CHNOPS
b)
dissolving
c)
color change, heat/light produced, odor, precipitate, or gas
d)
change in state of matter
68.

What does b represent?

a)

Proton

b)

Neutron

c)

Electron

69.

What does c represent?

a)

Proton

b)

Neutron

c)

Electron

70.

What is the atomic mass of this element?

a)

20

b)

60

c)

40

d)

41

71.

What is the symbol of this element?

a)

Calcium

b)

P

c)

Ca

d)

C

72.

protons

a)

negative charge, nucleus

b)

positive charge, shells

c)

positive charge , nucleus

d)

neutral charge, nucleus

73.

neutrons

a)

no charge, shells

b)

positive charge, nucleus

c)

neutral, no charge, nucleus

d)

negative charge, shells

74.

electrons

a)

no charge, nucleus

b)

positive charge, nucleus

c)

negative charge, shells

d)

negative charge, nucleus

75.
The characteristics or properties of metals include
a)
shiny and solid
b)
ductile and malleable
c)
lose electrons
d)
all of the above
76.
Which particle contributes the negative charge to the atom?
a)
proton
b)
electron
c)
neutron
d)
nucleus
77.
Water is an element?
a)
true
b)
false
78.
Gold is an example of a(n) 
a)
pure element
b)
pure compound
c)
pure mixture
79.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

80.
"C" is the element symbol for which element?
a)
calcium
b)
carbon
c)
chlorine
d)
cadmium
81.

True or False? Neutrons have a negative charge

a)

True

b)

False

82.
A _________ is a substance made of two or more DIFFERENT elements chemically combined. 
a)
mixture
b)
compound
c)
substance 
83.
A mixture can be separated by ________ means. 
a)
physical
b)
chemical
84.

What is the atomic number of this element?

a)

20

b)

60

c)

40

d)

41

85.

An electron is

a)

positively charged

b)

neutral

c)

negatively charged

86.

atomic number is

a)

the number of protons

b)

the number of electrons

c)

the number of neutrons

d)

the location of an atom on the periodic table

87.

Atomic Mass is the number of

a)

protons and neutrons in the nucleus of an atom

b)

protons and electrons in the nucleus of an atom

c)

neutrons and electrons in the nucleus of an atom

88.

Conservation of mass means

a)

all the atoms present before a chemical reaction are not present after

b)

atoms present before chemical reactions are present after

c)

new substances and new elements are formed in a chemical reaction

89.

An elements is

a)

a substance that cannot be split into simpler substances

b)

a substance that can be split into simpler substances

90.

A molecule is

a)

a singular particle of a particular element

b)

another name for an element

c)

2 or more atoms that are combined

91.

which of the statements on physical changes are correct

a)

A physical change cannot be reversed

b)

A physical change is a change in state

c)

A physical change is a change in form

d)

A physical change is where new substances are formed

92.

Signs of a chemical change include;

a)

change of colour, change of temperature, precipitate (solid) formed, gas released.

b)

change of colour, reversing back to original form, precipitate (solid) formed, gas released.

93.

Water is the product of the reactants:

a)

oxygen and water

b)

oxygen and carbon

c)

hydrogen and oxygen

94.

The type of reaction that releases energy as heat is called

a)

endothermic

b)

exothermic

c)

respiration

d)

photosynthesis

95.

which of the following are the characteristics of a chemical reaction (choose multiple answers)

a)

change of state

b)

change of colour

c)

change of precipitation

d)

formation of precipitation

e)

change of smell

96.

when a substance does not undergo a chemical reaction is known as a chemical change

a)

true

b)

false

97.

the chemical reactions which proceed with the release _________ are called _______________________________

a)

heat energy , endothermic reaction

b)

heat energy , exothermic reaction

c)

light energy , endothermic reaction

d)

light energy , exothermic reaction

98.

on which side are the reactants written

a)

left hand side

b)

right hand side

c)

middle

d)

nowhere

99.

a chemical equation that represents a chemical reaction briefly in words is called chemical equation

a)

true

b)

false

c)

cant tell

d)

none

100.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
101.
a)
Neutrons = Mass Number + Atomic Number
b)
Neutrons = Mass Number - Atomic Number
c)
Neutrons = Atomic Number + Electrons
d)
Neutrons = Atomic Number - Electrons
102.
a)
Mass Number = Atomic Number + Neutrons
b)
Mass Number = Atomic Number - Neutrons
c)
Mass Number = Atomic Number + Electrons
d)
Mass Number = Atomic Number - Electrons 
103.
a)
Electrons that are inside the nucleus
b)
Electrons on the outermost energy level 
c)
Electrons that are closest to the nucleus
d)
Electrons that have a positive charge
104.
a)
Number of protons
b)
Number of neutrons
c)
Number of electrons
d)
Mass Number
105.
a)
The number of protons
b)
The number of neutrons
c)
The Mass Number
d)
The number of valence electrons
106.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
107.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
108.
The particles that are found in the nucleus of an atom are
a)
neutrons and electrons
b)
electrons only
c)
protons and neutrons
d)
protons and electrons
109.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
110.

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

a)

groups

b)

towers

c)

periods

d)

atomic numbers

111.
The Modern Periodic Table of Elements is arranged by
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
112.

The horizontal (side to side) rows in the Periodic Table are called

a)

groups

b)

families

c)

periods

d)

atomic numbers

113.

What are the three main groups of the periodic table?

a)

groups

b)

metal

c)

nonmetals

d)

metalloids

e)

periods

114.

Which of the following elements is a non-metal in group 14?

a)

Carbon (C)

b)

Silicon (Si)

c)

Tin (Sn)

d)

Lead (Pb)

115.

Which two elements are in the same period?

a)

boron (B) and lithium (Li)

b)

beryllium (Be) and calcium (Ca)

c)

phosphorus (P) and oxygen(O)

d)

boron (B) and phosphorus (P)

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