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Bridge to Chemistry Review

Total questions: 69

Worksheet time: 4hrs 46mins

Name
Class
Date
1.

Which subatomic part of an atom gives it a positive charge?

a)

Neutron

b)

Proton

c)

Electron

d)

Nucleus

2.

Which region of an atom has a negative charge?

a)

The nucleus

b)

Both nucleus and electron cloud

c)

The neutrons

d)

The electron cloud

3.

What is the smallest 'building block' of the elements that make up the universe?

a)

An atom

b)

An electron

c)

A proton

d)

A cell

4.

An atom of carbon has 6 protons and 7 neutrons in its nucleus. If the atom is neutral, how many electrons does it have?

a)

0

b)

7

c)

6

d)

13

5.

The number of protons in the nucleus of an atom?

a)

Isotope

b)

Atomic mass

c)

Atomic number

d)

Element

6.

A certain atom of oxygen contains 8 protons, 8 neutrons, & 8 electrons. Another atom of unknown identity contains 9 protons. Which of the following MUST be true about this unidentified atom?

a)

It has 9 neutrons in its nucleus.

b)

It is an isotope of oxygen.

c)

Its atomic mass is a decimal number.

d)

It cannot be an atom of oxygen.

7.

Chemical reactions start with _____________ and end with _______________

a)

Reactants, Products

b)

Products, Reactants

c)

Substances, Chemicals

d)

Chemicals, Compounds

8.

The center of the atom is called

a)

Nucleus

b)

Negative

c)

Molecule

9.

"a" on the diagram is the

a)

Electron

b)

Nucleus

c)

Compound

10.

Particle with a positive charge (+)

a)

Proton

b)

Neutron

c)

Mixture

11.

Particle with a negative charge (-)

a)

Electron

b)

Neutral

c)

Proton

12.

How many protons in an atom of sodium (Na)?

a)

11

b)

8

c)

2

13.

Element H is

a)

Hydrogen

b)

Helium

c)

Iron

14.

O is the symbol for

a)

Oxygen

b)

Gold

c)

Carbon

15.

C is element

a)

Carbon

b)

Calcium

c)

Chlorine

16.

2 or more elements bonded together is

a)

Compound

b)

Mixture

c)

Chemical formula

17.

Which is an example of a compound?

a)

CO2

b)

O2

c)

Na

18.

The chemical formula of this compound is

a)

C2H6

b)

Ca2HO4

c)

C6H2

19.

How many Carbon atoms are in this compound

a)

6

b)

7

c)

3

20.

Elements are _________ 1 type of atom.

a)

Made of

b)

Tiny

c)

chemical formula

21.

How many elements are in this chemical formula?

H2SO4H_2SO_4  

a)

1

b)

2

c)

3

d)

4

22.

How many atoms of Carbon are in this formula? C6 H12O6C_{6\ }H_{12}O_6  

a)

6

b)

1

c)

12

23.

What elements are represented in this chemical formula? Fe2O3Fe_2O_3  

a)

Iron, Oxygen

b)

Francium, Europium, Oxygen

c)

Ferrium, Oxygen

d)

Berylium, Oxygen

24.

Which of the following is a molecule of a compound?

a)

H2H_2

b)

Cl2Cl_2

c)

H2OH_2O

d)

F2F_2

25.

Which does not belong in the group?

a)

Sodium

b)

Glucose

c)

carbon

d)

Element

26.

Is this an element or a compound? CaSO4CaSO_4  

a)

Element

b)

Compound

27.

How many elements are in this chemical formula? NaHCO3NaHCO_3  

a)

1

b)

2

c)

3

d)

4

28.
What does the 6 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
29.
What does 12.011 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
30.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
31.
These are found on the Periodic Table.
a)
Compounds
b)
Elements
c)
Mixtures
32.

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

a)

element

b)

subatomic particle

c)

electron

d)

matter

33.

the basic structural unit of matter

a)

atom

b)

matter

c)

element

d)

nucleus

34.

a unique number for each element that equals the number of protons in an atom of that element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

35.

the mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

36.
The atomic number of this pictured element is
a)
28
b)
58.6934
c)
Ni
d)
Nickel
37.
What is the atomic mass of Neon?
a)
10
b)
30
c)
10.18
d)
20.18
38.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
39.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
40.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
41.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__H2 + __S --> __H2S
a)
1,1 --> 1
b)
2,2 --> 2
c)
1,2 --> 1
d)
1,2 --> 2
42.

A chemical reaction ...

a)

forms a new substance

b)

makes a mixture of several substances

c)

always involves flames

d)

all of these choices are true

43.

Electrons are:

a)

Positive

b)

Neutral

c)

Negative

44.
What is the charge of a neutron?
a)
positive
b)
negative
c)
neutral
d)
sweet
45.

Which of the following is a model of a carbon atom?

a)
b)
c)
d)
46.

Which of the following is the correct chemical equation for producing water?

a)

H2 + O2 --> H2O

b)

2H2 + 2O2 --> 2H2O

c)

2H2 + O2 --> 2H2O

d)

H2 + 2O2 --> 2H20

47.

How many atoms of hydrogen are in this compound?

a)

1

b)

2

c)

3

d)

4

48.

How man atoms of carbon are there?

a)

1

b)

2

c)

3

d)

4

49.

Select the chemical formula for this molecule?

a)

B1F3

b)

BF

c)

BF3

d)

FB

50.

Found on the right side of a chemical equation.

a)

products

b)

reactants

c)

subscript

d)

coefficient

51.

Found on the left side of a chemical equation.

a)

products

b)

reactants

c)

subscript

d)

coefficient

52.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
53.
What is the mass number defined as?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
54.
What is the atomic number of this atom?
a)
1
b)
3
c)
4
d)
7
55.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

56.

An element has the mass number 12 and atomic number 6. The number of neutrons in it is:

a)

6

b)

10

c)

4

d)

8

57.

If an atom has 10 electrons, how many protons does it have?

a)

0

b)

1

c)

10

d)

5

58.

Is the following equation balanced?

Al + O2 ---> 2Al2O3

a)

YES

b)

NO

59.

Is the following equation balanced?

2C2H2 + 5O2 ---> 4CO2 + 2H2O

a)

YES

b)

NO

60.

Is the following equation balanced?

NaHCO3 ---> Na2CO3 + H2O + CO2

a)

YES

b)

NO

61.

Balance this equation:

H2 + Cl2 ---> HCl

a)

It is balanced.

b)

H2 + Cl2 ---> 2HCl

c)

3H2 + Cl2 ---> 6HCl

d)

H2 + 3Cl2 ---> 6HCl

62.
What is the Law of Conservation of Mass?
a)
It states that no matter can be created or destroyed.
b)
It states that no energy can be created or destroyed.
c)
It states that matter can be created or destroyed.
d)
It states that no sound can be created or destroyed.
63.
What is a valence electron?
a)
an electron that is found in the outermost shell of an atom. 
b)
an electron found in the innermost shell of an atom.
c)
an electron found in the middle shell.
64.

Which element is this?

a)

Nickel

b)

Neon

c)

Sodium

d)

Nitrogen

65.

What is the significance of valence electrons in chemical bonding?

a)

Valence electrons are involved in the formation of chemical bonds and determine the reactivity of an atom.

b)

Valence electrons are responsible for the stability of an atom.

c)

Valence electrons determine the color of a substance.

d)

Valence electrons are found in the innermost energy level of an atom.

66.

What kind of particles do solids have?

a)

Rigid and close together.

b)

Loosely together with slow movement.

c)

Fast and free moving!

67.

What state of matter?

a)

Solid

b)

Liquid

c)

Gas

68.

What state of matter?

a)

Solid

b)

Liquid

c)

Gas

69.

Particles begin to move faster if they have an increase in

a)

speed

b)

size of particle

c)

thermal energy

d)

thermometer

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