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Gr 6-8 Chemistry Review

Total questions: 100

Worksheet time: 2hrs 56mins

Name
Class
Date
1.
Which is NOT a form of matter??
a)
atom
b)
element
c)
energy
d)
compound
2.
What particles make up atoms??
a)
Protons
b)
Neutrons
c)
Electrons
d)
All of the above
3.
What is the electrical charge of a proton?
a)
Positive
b)
Negative
c)
Neutral
4.
What is the electrical charge of an electron?
a)
Positive
b)
Negative
c)
Neutral
5.
Which group of elements will NOT react with other elements?
a)
Metals
b)
Metalloids
c)
Non-metals
d)
Noble gases
6.
What is the GREATEST number of valence electrons an atom can have in the 2nd shell?
a)
1
b)
3
c)
6
d)
8
7.
Substances listed of the left side of a chemical equation are the...
a)
Reactants
b)
Coefficients
c)
Products
d)
Precipitates
8.
What is the smallest part of an element?
a)
Molecule
b)
Atom
c)
Mixture
d)
Compound
9.
A row across the Periodic Table is called...
a)
Family
b)
Section
c)
Period
d)
Group
10.
What are the particles that move rapidly in all directions in the space outside the nucleus called?
a)
Electrons
b)
Ions
c)
Protons
d)
Neutrons
11.
Elements on the Period Table are classified into categories such as 
a)
Rocks and minerals
b)
Metals and Non-Metals 
c)
Molecules and Atoms
d)
Mixtures and Compounds
12.
Noble gas is classified as a...
a)
Compound
b)
Element 
c)
Mixture
13.
Salt dissolved in water is classified as...
a)
Element
b)
Compound
c)
Mixture
14.
Hydrogen chemically combined with oxygen is classified as...
a)
Compound
b)
Element
c)
Mixture
15.
_______ and _______ are located inside of the nucleus.
a)
Electrons and Protons
b)
Protons and Neutrons
c)
Neutrons and Electrons
16.
What charge does a neutron have?
a)
+1
b)
-1
c)
No charge
17.
If a Carbon atom has 6 protons, how many electrons will it have?
a)
2
b)
4
c)
6
d)
8
18.
Is Potassuim (K) a metal, non-metal, or a metalloid?
a)
Metal
b)
Non-Metal
c)
Metalloid
d)
Other
19.

The atomic mass of nitrogen is

a)

7

b)

14.007

c)

21.007

d)

Cannot be known from the given

20.

The number of protons in a sulfur atom is

a)

0

b)

16

c)

32

d)

None of the above answers

21.
How many protons does chlorine have?
a)
35
b)
17
c)
18
d)
4
22.
Which group of elements have both metal and non-metal characteristics?
a)
lanthanides
b)
metalloids
c)
actinides
d)
noble gases
23.

An irreversible change takes place when

a)

Salt is added to water

b)

Charcoal burns

c)

Ice melts

d)

An iron nail is magnetized

24.
Which type of change is most often easily reversed?
a)
Chemical
b)
Physical
c)
Both
25.
Drying wet hair is an example of a __________ change.
a)
Chemical
b)
Physical
c)
Both
26.
Pancakes cooking on a griddle
a)
Chemical Change
b)
Physical Change
27.

One example of a physical change is

a)

burning paper.

b)

baking cookies.

c)

heating table sugar

d)

dissolving salt in water

28.
Properties that describe how a substance reacts with other substances are called?
a)
Chemical properties
b)
Physical properties
29.
Is milk going sour a physical or chemical change?
a)
Physical 
b)
Chemical
30.
Baking soda and vinegar combine to make carbon dioxide
a)
Chemical Change
b)
Physical Change
31.

Is burning sugar a...

a)

Chemical Reaction

b)

Physical Reaction

32.

Ripping cardboard is an example of

a)

Physical Change

b)

Chemical Change

33.

Baking a cake is an example of

a)

Physical Change (Just changed phases)

b)

Chemical Change (can't change it back)

34.

How do you know a chemical reaction takes place?

a)

Something new is made

b)

Changes Color

c)

Changes Temp

d)

Bubbles or Steams

e)

ALL of the ABOVE

35.

When you change from solid to liquid it is called..

a)

Freezing

b)

Melting

c)

Evaporation

d)

Condensation

36.

When you change from gas to liquid it is called..

a)

Freezing

b)

Melting

c)

Evaporation

d)

Condensation

37.

When you change from liquid to a gas it is called..

a)

Freezing

b)

Melting

c)

Evaporation

d)

Condensation

38.

When you change from liquid to a solid it is called..

a)

Freezing

b)

Melting

c)

Evaporation

d)

Condensation

39.

What is the difference between HO and He?

a)

HO what santa says while delivering presents

b)

No difference

c)

HO is two elements because both are caps and He is one element since it is lower case

d)

They are both two atoms

40.

How many atoms is in this formula?

Na2 CO3

a)

3

b)

4

c)

5

d)

6

41.

Is NaCl an element or compound?

a)

Element

b)

Compound

c)

Both

42.

Is 02 a element or compound

a)

Element

b)

Compound

43.

In this equation 2NaF + Br2 →2NaBr +F2

The underline part is a ...

a)

Product

b)

Reactant

c)

Element

44.

In this equation 2NaF + Br2 →2NaBr +F2

The underline part is a ...

a)

Product

b)

Reactant

c)

Element

45.

Somethings ability to dissolve, or mix completely with a liquid, is

a)

solubility.

b)

boiling point.

c)

freezing point.

d)

density.

46.

Which of the following is an example of something dissolving?

a)

Mixing sugar, lemon juice, and water for lemonade.

b)

Mixing sand and gravel for the substrate of a fish tank.

c)

Mixing oil and vinegar for salad dressing.

d)

Mixing cereals and nuts for a snack mix.

47.

Which of the following is a compound containing more than one element?

a)

NaCl

b)

Be

c)

S

d)

Ne

48.

Which of the following chemical formulas has a subscript?

1. H2O

2. 2HCl

3. NaCl

a)

1 only

b)

2 only

c)

3 only

d)

1 and 2

49.

How many oxygen atoms are in an atom of hydrogen peroxide (H2O2) ?

a)

2

b)

4

c)

1

d)

8

50.

How many atoms are in the following chemical formula?

C6H12O6

a)

24

b)

3

c)

18

d)

12

51.

What is the atomic number of the atom?

a)

6

b)

12

c)

18

d)

3

52.

___________ are the smallest unit of an element that maintains the properties of that element.

a)

Atoms

b)

Elements

c)

Compounds

d)

Mixtures

53.

True or False: elements AND compounds are pure substances.

a)

True

b)

False

54.

A ______________ mixture is one that does not have a uniform composition.

a)

heterogeneous

b)

homogenous

c)

pure substance

55.

Coffee, mouthwash, and vinegar are examples of __________________ mixtures.

a)

heterogeneous

b)

homogeneous

c)

pure

56.

Air is:

a)

An element

b)

A compound

c)

A mixture

d)

None of these

57.
What is evaporization?
a)
a gas becoming a liquid
b)
a liquid becoming a solid
c)
a gas becoming a solid
d)
a liquid becoming a gas
58.
Is spoiling food a physical or chemical change?
a)
phyiscal
b)
chemical
59.

What is physical change?

a)

How two chemicals react with one another when combined

b)

A property that we can measure or observe with our 5 senses or other tools

c)

When two chemicals react with one another to form a new substance

d)

When a change occurs but it does not result in the formation of a new substance

60.
Properties that describe how a substance looks, feels, state of matter, etc. are?
a)
Chemical properties
b)
Physical properties
61.

This is an example of a ________ change.

a)

physical

b)

chemical

62.

According to Dalton's atomic theory, atoms are indestructible and indivisible. True or False?

a)

True

b)

False

63.

According to Dalton's atomic theory, different atoms are combined in fixed, whole number ratios to form _________

a)

Compounds

b)

Molecules

c)

Isotopes

d)

Mixtures

64.

What is material that has mass and takes up space?

a)

volume

b)

mass

c)

matter

d)

density

65.

Which of the following is NOT a subatomic particle?

a)

protons

b)

neutrons

c)

ions

d)

electrons

66.
What part of the atom is the arrow pointing to?
a)
nucleus
b)
proton
c)
electron shell
d)
electron
67.
An atom is made up mostly of
a)
protons
b)
gravity
c)
empty space
d)
electricity
68.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
69.
Salt has a chemical formula of NaCl.  Salt is a...
a)
Compound
b)
Element
c)
Mixture
d)
None of the Above
70.

What charge does the nucleus have?

a)

Positive

b)

Negative

c)

Neutral

71.
Why do elements bond?
a)
To be friends
b)
To create a new element
c)
To become stable
72.
How are covalent bonds formed?
a)
Sharing of electrons
b)
Transfer of electrons
73.

What type of bond is shown in the image?

a)

Hydrogen

b)

Ionic

c)

Covalent

74.

What are valence electrons?

a)

electrons that are in the electron cloud

b)

all the electrons in an atom

c)

electrons in outer shell of an atom

75.

The nucleus of an atom is made of...

a)

protons and electrons

b)

protons and neutrons

c)

electrons and neutrons

d)

peanut butter and jelly

76.

The subatomic particle with a negative charge is the...

a)

electron

b)

neutron

c)

proton

d)

nucleus

77.

Which of the following is true?

a)

Air has volume, but no mass

b)

Air has mass, but no volume

c)

Air has mass and volume

d)

Air does not have mass or volume

78.

What is an ion?

a)

A neutral atom

b)

a charged atom (either negative or positive)

c)

A complex molecule that is magnetic

d)

a phase change rarely seen on earth

79.

If an atom has a neutral charge, then...

a)

it has more protons than electrons

b)

it has more electrons than protons

c)

it has equal numbers of protons and neutrons

d)

it has equal numbers of protons and electrons

80.

When 2 or more atoms bond together, they are called molecules.

a)

True

b)

False

81.

When molecules contain atoms from 2 or more different elements, it is called a compound.

a)

True

b)

False

82.

Which group of elements is a non-metal group

a)

Neon, Argon, Iodine

b)

Hydrogen, Oxygen, Beryllium

c)

Francium, Barium, Mercury

d)

Thallium, Sulphur(sulfur), Boron

83.

What is an Element?

a)

A substance that can't be broken down into other substances

b)

The trio: Fire, Water, Ice

c)

Who knows?

d)

A mixture of two substances

84.

What is a metal element

a)

An element or substance that is hard when in solid state, opaque, shiny, and has good electrical and thermal conductivity.

b)

An element or substance that is not hard

c)

An element or substance that is unknown

d)

Part of the Halogen group

85.

What is it?

a)

Pure Substance

b)

Mixture

86.
When an object changes shape when struck by a hammer.
a)
luster
b)
malleable
c)
brittleness
d)
ductile
87.
What is a conductor?
a)
Heat and electricity move through them easily
b)
able to be drawn into a wire
c)
able to be hammered into different shapes
d)
shiny
88.
Good conductor of heat
a)
Metal
b)
Nonmetal
89.
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
90.
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
91.
If a material can easily be drawn into the shape of a wire, it is
a)
Ductile
b)
Magnetic
c)
Malleable
d)
Reactive
92.

What is an Element?

a)

A substance that can't be broken down into other substances

b)

The trio: Fire, Water, Ice

c)

Who knows?

d)

A mixture of two substances

93.
A pure substance that cannot be separated into simpler substances by chemical or physical means.  
a)
Element
b)
Compound
c)
Mixture
d)
Chemical
94.
A compound is made of ________ atoms. 
a)
big 
b)
similar 
c)
different 
95.
Carbon Dioxide is a ______ 
a)
compound 
b)
element 
c)
mixtures 
d)
Battle of Bunker Hill 
96.
These contain only one kind of atom. 
a)
element 
b)
compound 
c)
mixture 
d)
water 
97.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
98.
Pizza
a)
Element
b)
Compound
c)
Heterogenous Mixture
d)
Solution
99.

The chart below lists some substances and their symbols. How many of these substances are examples of elements?

a)

1

b)

2

c)

3

d)

4

100.

The chart below lists some substances and their symbols. How many of these substances are examples of elements?

a)

1

b)

2

c)

3

d)

4

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