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Chemistry Review

Total questions: 70

Worksheet time: 36mins

Name
Class
Date
1.

How many electrons does an atom of Lithium have?

a)

3

b)

6.941

c)

4

d)

2.941

2.

How many protons does one atom of Lithium have?

a)

6.941

b)

4

c)

9.941

d)

3

3.

A and D are found in the _____ of an atom.

a)

Electron

b)

Neutron

c)

Nucleus

d)

Proton

4.

Which particle is the electron?

a)

A

b)

B

c)

C

d)

D

5.

Which particle is a neutron?

a)

A

b)

B

c)

C

d)

D

6.

Which number is the atomic number?

a)

3

b)

4

c)

6.941

d)

9.941

7.

What is the combined mass of all the protons and neutrons of an atom and is approximately equal to the number of protons and neutrons called?

a)

Electron weight

b)

Atomic number

c)

Subatomic particles

d)

Mass number

8.

What is the symbol for Potassium?

a)

P

b)

K

c)

19

d)

39.098

9.

How many valence electrons are there in the atom pictured?

a)

2

b)

6

c)

8

d)

10

10.

Which particle of an atom determines whether an atom bonds with another atom?

a)

Protons

b)

Valence Electrons

c)

Neutrons

d)

Nucleus

11.

What does a period on the periodic table tell us about the elements in it?

a)

Number of protons

b)

Number of electrons

c)

Number of neutrons

d)

Number of electron shells

12.

What does a group on the periodic table represent for an element in that group?

a)

Number of protons

b)

Number of valence electrons

c)

Number of neutrons

d)

Number of electron shells

13.

All the following are groups on the periodic table except _____.

a)

Alkali Metals

b)

Alkaline Earth Metals

c)

Halogens

d)

Radioactive Metals

14.
On the Periodic Table each element increases by one _________
a)
electron
b)
proton
c)
neutron
d)
letter
15.
What is a pure substance that cannot be broken down into any other substance by physical or chemical means. Ex: Gold, Silver, Oxygen, & Nitrogen
a)
element
b)
compound
c)
mixture
d)
salad
16.
What is a  pure substance made of two or more elements chemically combined in a set ratio. Ex: CO2 has a set ratio of 1:2, meaning for every one carbon atom there are two oxygen atoms.
a)
element
b)
compound
c)
mixture
d)
salad
17.
What type of property can only be observed by changing the substance into a new substance. Ex: Flammability, oxidation
a)
chemical
b)
physical
18.
Gold is an example of a(n) 
a)
pure element
b)
pure compound
c)
pure mixture
19.
Air is an example of a(n)
a)
element
b)
compound
c)
heterogenous mixture
d)
homogenous mixture
20.
In a mixture items can be separated __________
a)
chemically
b)
physically
21.
Phase changes (going from a solid to a liquid to a gas) are what types of changes?
a)
chemical
b)
physical
22.
who developed the modern day periodic table of elements?
a)
Darwin
b)
Shultz
c)
Hooke
d)
Mendeleev
23.
On the Periodic Table each element increases by one _________
a)
electron
b)
proton
c)
neutron
d)
letter
24.
A row across the Periodic Table where each element has the same number of energy shells
a)
column
b)
family
c)
period
25.
In a family or column, the elements have similar properties because they all have the same number of
a)
protons
b)
neutrons
c)
valence electrons
d)
electrons
26.
What is the octet rule?  How many valence electrons can the first three periods hold?
a)
8
b)
2
c)
2 8 8
d)
2 8 16
27.

What is the difference between Chemical and Physical changes

a)

Physical Creates a new substance, Chemical changes the state of matter

b)

Chemical makes a new substance, Physical is the state of matter

c)

I don't know cause i haven't studied for the benchmark

d)

I don't know cause i didn't pay attention in class

28.
The _______ describes the atoms in a compound.
a)
chemical equation
b)
chemical formula
c)
chemical symbol
d)
coefficient
29.
A _________ is a solid that forms during a chemical reaction.
a)
precipitate
b)
solute
c)
solvent
d)
gas
30.
Which is NOT an example of a chemical change.
a)
steam from a coffee cup
b)
burning socks
c)
forming precipitate
d)
getting warmer
31.
The substances that are formed in a chemical reaction are called _________
a)
products
b)
reactants
c)
symbols
d)
formulas
32.

The big number on the front of the chemical formula is called the ______

a)

Coefficient

b)

Element Symbol

c)

Subscript

d)

Atomic Number

33.

An atom is

a)

any small simple particle

b)

a small unit particle of an element

c)

a small unit particle of a compound

d)

a molecule

34.

A molecule is

a)

a particle made up of atoms joined together

b)

a particle made up of different types of atoms joined together

c)

any partilcle

d)

a compound

35.

Which of the following is a compound

a)

air

b)

nitrogen

c)

carbon

d)

carbon monoxide

36.

How many atoms make up one molecule of laughing gas?

a)

1

b)

2

c)

3

d)

4

37.

When we combined vinegar and baking soda and created carbon dioxide what was the product?

a)

vinegar

b)

carbon dioxide and baking soda

c)

carbon dioxide

d)

vinegar and baking soda

38.
Which of the following is a chemical reaction?
a)
Burning bread in the toaster.
b)
melting wax in a microwave.
c)
dissolving salt in water
d)
boiling water to make steam.
39.
Which is NOT an example of a chemical change.
a)
steam from a coffee cup
b)
burning socks
c)
forming precipitate
d)
getting warmer
40.
anything that has mass and takes up space
a)
matter
b)
mixture
c)
solution
d)
compound
41.
mixture in which the composition is not uniform throughout
a)
homogeneous mixture
b)
heterogeneous mixture
42.
The chemical compound of water is
a)
HO
b)
H2O
c)
H3O
d)
HO2
43.
Which of these are signs that a chemical reaction has occurred?
a)
Change in color 
b)
Release of light
c)
Change in odor
d)
All are correct
44.

What does malleable mean?

a)

able to be hammered or rolled into sheets

b)

will break easily

c)

able to be pulled into a wire

d)

is shiny

45.
If a material can easily be drawn into the shape of a wire, it is
a)
Ductile
b)
Magnetic
c)
Malleable
d)
Reactive
46.

Vanadium (V) is a good conductor, malleable and ductile. What type of element is vanadium?

a)

Metal

b)

Nonmetal

c)

Metalloid

d)

Superconductor

47.

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)

Superconductor

48.

Which elements are found along the zig-zag line?

a)

metals

b)

nonmetals

c)

metalloids

d)

superconductors

49.
Which element is a metalloid?
a)
Titanium
b)
Selenium
c)
Potassium
d)
Polonium
50.

Which elements are colored red?

a)

nonmetals

b)

metals

c)

metalloids

51.

What is the left part of a chemical equation called?

2H2 + O2 ---> 2H2O

a)

Reactants

b)

Yields

c)

Products

d)

Chemical equation

52.

What is the right part of a chemical equation called?

2H2 + O2 ---> 2H2O

a)

Reactants

b)

Yields

c)

Products

d)

Chemical Equation

53.

How many Mn atoms are found in the following compound?

2MnO4

a)

1

b)

2

c)

4

d)

8

54.

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

Example: H2

a)

Coefficient

b)

Atom

c)

Subscript

d)

Equation

55.

What is the number before a chemical formula called?

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

a)

Coefficient

b)

Atom

c)

Subscript

d)

Equation

56.

How many elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

57.

Balance this equation:

H2 + Cl2 ---> HCl

a)

It is balanced.

b)

H2 + Cl2 ---> 2HCl

c)

3H2 + Cl2 ---> 6HCl

d)

H2 + 3Cl2 ---> 6HCl

58.

Balance this equation:

HgO ---> 2Hg + O2

a)

It is balanced.

b)

2HgO ---> 2Hg + O2

c)

2HgO ---> Hg + O2

d)

HgO ---> Hg + 2O2

59.

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.

60.
What are the smaller numbers that you CANNOT change in a chemical equation? 
a)
Coefficient
b)
Products
c)
Reactants
d)
Subscript
61.

Refer to the picture shown. What kind of mixture is it?

a)

Homogenous Mixture

b)

Heterogenous Mixture

62.
a)

Homogeneous Mixture

b)

Heterogeneous Mixture

63.

Which mixture has two or more different substances that each part could be seen easily ?

a)

solution

b)

homogeneous

c)

heterogeneous

64.
A combination that can be separated by physical processes is a .....
a)
Atom
b)
Compound
c)
Element
d)
Mixture
65.

What am I?

a)

Element

b)

Compound

c)

Mixture

66.

What am I ?

a)

Element

b)

Mixture

c)

Compound

67.

What does this pic illustrate?

a)

Element

b)

Mixture of Compunds

c)

Mixture of elemets

d)

Compounds

68.

Filtration and evaporation are...

a)

A mixture of two substances.

b)

A homogeneous mixture.

c)

Methods to separate the components of mixtures.

d)

A physical combination.

69.

Which method can you use to separate sand and iron filings?

a)

Distillation

b)

Magnetism

c)

Filtration

d)

Evaporation

70.

Air is:

a)

An element

b)

A compound

c)

A mixture

d)

None of these

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