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Year8_Chemistry_Shields

Total questions: 111

Worksheet time: 1hrs 16mins

Name
Class
Date
1.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
2.
Which of the following could be a symbol on he periodic table of elements?
a)
JZ
b)
jz
c)
Jz
d)
JZa
3.
Salt water boils and the water completely evaporates, salt (NaCl) is left in the bottom of the beaker. Which of the following is left in the beaker?
a)
Compound
b)
Element
c)
Mixture
d)
None of the Above
4.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
5.
What is made up two or more elements that are chemically combined?
a)
Element
b)
Mixture
c)
Compound
d)
Solids
6.
Which of the following an element?
a)
Carbonic Acid
b)
Copper
c)
Iron and Copper
d)
Water
7.
How many elements are represented in the compound?
Na2CO3
a)
1
b)
2
c)
3
d)
4
8.

Name the ionic compound, CaCO3

a)

calcium carbide

b)

calcium carbon trioxide

c)

calcium carbon oxide

d)

calcium carbonate

9.

H2O - name?

a)

hydrooxic acid

b)

hydroxic acid

c)

water

d)

hydrogen oxide

10.

Name the following compound:

CO2

a)

monocarbon dioxide

b)

carbon oxide

c)

carbon dioxide

d)

oxygen carbonide

11.
Where are the non-metals located on the periodic table?
a)
All over
b)
On the left side of the "staircase"
c)
On the right side of the "staircase"
12.
Water (H2O) freezing is an example of:
a)
A chemical change
b)
A physical change
13.
You drop two Alka-Seltzer tablets in a glass of water and immediately see bubbles coming up through the water. They probably indicate:
a)
A change of color
b)
Formation of a gas
c)
A change in temperature
d)
Formation of a precipitate
14.
A chemical change always results in the formation of a:
a)
explosion
b)
big mess
c)
new substance
d)
new state of matter
15.
What is this element...Au
a)
Iron
b)
Titanium
c)
Gold
d)
Flourine
16.

Which element is Fe

a)

Fire

b)

Fluorine

c)

Ferrnum

d)

Iron

17.
What is the symbol for Calcium
a)
Cl
b)
Ca
c)
Cm
d)
ca
18.
Element is a
a)
pure substance
b)
compound
c)
mixture
d)
molecule
19.
What does the element AI stand for ?
a)
Gold
b)
Actinium
c)
Iron
d)
Aluminum
20.
SULFUR
a)
Su
b)
S
c)
Sf
d)
Si
21.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
22.
How many different elements are in this chemical formula: C2H2ClK3
a)
6
b)
8
c)
2
d)
4
23.

Which is the atomic number?

a)

34.546

b)

29

c)

92.546

d)

63.546

24.

What does the '12' represent?

a)

atomic mass

b)

the amount of neutrons

c)

the amount of protons

d)

number of protons + electrons

25.
The condition which are required for combustion to take place are:
a)
fuel
b)
ignition temperature
c)
oxygen
d)
all of these
26.

Another term for burning is

a)

Rusting

b)

Heat

c)

Combustion

d)

Exploding

27.
Which of these isn't in the fire triangle?
a)
Fuel
b)
Heat
c)
Oxygen
d)
Carbon dioxide
28.

A compound that contains only carbon and hydrogen and that produces carbon dioxide and water when burned is called a(n)

a)

acid

b)

carbonate

c)

compound

d)

hydrocarbon

29.

8.7: Combustion is when a __________ reacts with oxygen

a)

petrol

b)

fuel

c)

fire triangle

d)

carbon dioxide

30.
What kind of energy conversion does a combustion reaction involve?
a)
Kinetic to Potential Energy
b)
Chemical Potential Energy to Kinetic or Thermal Energy
c)
Potential Energy to Nuclear Energy
d)
Mass to Energy
31.

In this chemical reaction, which is the product/s?

Magnesium + Oxygen --> Magnesium oxide

a)

magnesium

b)

magnesium and oxygen

c)

magnesium oxide

d)

oxygen

32.

What does a fuel need in order to burn?

a)

fuel

b)

electricity

c)

oxygen

d)

hydrogen

33.

Hydrocarbons are fuels containing only:

a)

carbon and oxygen

b)

carbon and hydrogen

c)

carbon dioxide and hydrogen

d)

hydrogen and nitrogen

34.
Which of the following is the product of the reaction of aluminium and oxygen?
a)
aluminium oxide.
b)
metal oxide
c)
aluminium ore
d)
aluminium and oxygen
35.

What is the scientific term given when something burns?

a)

a fuel

b)

flammable

c)

combustion

d)

heating

36.
How are metal oxides formed?
a)
When metals react with oxide.
b)
When metals react with water.
c)
When metals react with air.
d)
When metals react with oxygen.
37.
Which of the following reactions produces calcium oxide?
a)
calcium and oxide
b)
calcium and water
c)
calcium and air
d)
calcium and oxygen
38.
Which of the following defines oxidation?
a)
A chemical reaction where a substance gains oxygen.
b)
A chemical reaction where a substance loses oxygen.
c)
A chemical reaction where a substance loses a metal.
d)
A chemical reaction where a substance gains a metal.
39.
Which of the following is an example of an oxidation reaction?
a)
Ca  +   O2 --> CaO
b)
Na2O  + H2O --> NaOH
c)
Fe2O3   + CO --> Fe   +  CO2
d)
All of the choices are oxidation reactions.
40.

In a word equation, the starting chemicals are called...

a)

reactants

b)

products

c)

ingredients

d)

inputs

41.

What was the chemical name given to Rust ?

a)

Carbon

b)

Iron Oxide

c)

Iron Oxygen

d)

Magnesium Oxide

42.

The combustion of hydrocarbons produces 2 things:

a)

nitrogen and carbon dioxide

b)

water and hydrogen

c)

nitrogen and hydrogen

d)

water and carbon dioxide

43.

The word equation for combustion is:

fuel + oxygen --> water + ..........................................

a)

Carbon dioxide

b)

Limewater

c)

Hydrogen

d)

Nitrogen

44.

A puddle dries up by the process of _____.

a)

evaporation

b)

melting

c)

freezing

d)

condensation

45.

When you open a solid room air freshener, the solid slowly loses mass and volume as the solid turns into a gas as the room freshener's particles escape and mix with the air in the room. This process is known as ______.

a)

sublimation

b)

boiling

c)

freezing

d)

condensation

46.
The change from a gas to a liquid is called 
a)
condensation
b)
evaporation
c)
sublimation
d)
deposition
47.

In which state of matter are particles moving the slowest?

a)

solid

b)

liquid

c)

gas

d)

plasma

48.
The state that matter exists in depends on its 
a)
volume 
b)
weight
c)
temperature 
d)
mass
49.
What is the melting point of water?
a)
212°C
b)
100°C
c)
32°C
d)
0°C
50.

Both boiling and evaporation are forms of vaporization. What is the difference between them?

a)

Boiling liquids have intense heat added to it, evaporating liquids take heat from their environment.

b)

Boiling happens quickly, evaporation happens slowly.

c)

Evaporation occurs only at a liquid's surface, boiling occurs throughout the liquid

d)

All of these reasons

51.
Adding more heat energy to particles of matter will
a)
make them move slower
b)
make them move faster
c)
make them stop moving
d)
destroy them
52.

What is it called when the state of matter changes from a liquid to a solid?

a)

Vaporisation/boiling

b)

Freezing

c)

Condensation

d)

Melting

53.
What is it called when the state of matter changes from a liquid to a solid?
a)
Vaporization
b)
Freezing
c)
Condensation
d)
Melting
54.

What is the boiling point of water?

a)

212°C

b)

100°C

c)

32°C

d)

0°C

55.

On a hot, humid summer day drops of water form on a can of cold soda. What process caused this to happen?

a)

condensation

b)

freezing

c)

vaporization

d)

deposition

56.

Kinetic theory of matter states that...

a)

particles in an object are always moving.

b)

solids can only become liquids.

c)

solids can condense to liquids

d)

particles stay stuck to each other

57.
Measure of the amount of matter 
a)
mass
b)
volume
c)
weight
d)
density
58.

Anything that has mass and takes up space

a)

gravity

b)

force

c)

matter

d)

volume

59.
Smallest unit of an element
a)
compound
b)
atom
c)
molecule
d)
product
60.
Smallest unit of a compound
a)
atom
b)
density
c)
element
d)
molecule
61.
Substance that cannot be broken into simpler substances
a)
element
b)
molecule
c)
gram
d)
proton
62.
Number written below & to the right of a chemical symbol
a)
subscript
b)
reactant
c)
product
d)
coefficient
63.
Unreactive gases in last column of periodic table
a)
halogens
b)
alkali metals
c)
noble gases
d)
metalloids
64.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
65.
How many iron atoms are in 
Fe(NO3)2
a)
1
b)
2
c)
3
d)
6
66.
How many nitrogen atoms are in 
Fe(NO3)2
a)
1
b)
2
c)
3
d)
6
67.
What units are used to measure mass of an object?
a)
cm
b)
cm3
c)
g
d)
g/cm3
68.
What is the formula to calculate density
a)
mass/volume
b)
mass x volume
c)
mass + volume
d)
mass - volume
69.
What two factors do you need to calculate density?
a)
matter and mass
b)
matter and volume
c)
mass and volume
d)
weight and volume
70.
You are given the following information: mass = 48 g; volume = 24 cm3. What is the density of this substance? 
a)
2 g/cm3
b)
1,152 g/cm3
c)
0.5 g/cm3
d)
72 g/cm3
71.
If a piece of matter changes shape, what happens to its mass?
a)
It increases
b)
It decreases
c)
it changes randomly
d)
it stays the same
72.
Anything made of matter must _____________________.
a)
take up space and have mass
b)
have mass and be a solid
c)
be a solid and not move
d)
take up space and be a liquid
73.
The mass of an object ___________________________.
a)
changes, depending on where it is located
b)
changes randomly
c)
changes, depending on temperature
d)
does not change
74.

What is the formula mass of LiCl2?

a)

20

b)

37

c)

42.5

d)

78

75.

What is the mass of Br2?

a)

35

b)

70

c)

80

d)

160

76.

What is the formula mass of MgO?

a)

20

b)

40

c)

28

d)

32

77.

What is the formula mass of C2H6?

a)

60

b)

30

c)

48

d)

110

78.

What is the relative molecular mass of CO2?

a)

12

b)

16

c)

32

d)

44

79.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

80.
Subatomic particles with a positive charge
a)
neutrons
b)
atomic mass
c)
protons
d)
isotopes
81.
Measure mainly of the nuclear particles: protons + neutrons
a)
Subatomic Particles
b)
Atomic Number
c)
Atomic Mass
d)
Gluons
82.
Value representing the number of protons in an element
a)
Atomic Mass
b)
Mass Number
c)
Valence Electrons
d)
Atomic Number
83.
Subatomic particles that are neutral in charge
a)
Neutrons
b)
Protons
c)
Nucleus 
d)
Electrons
84.
Where electrons are likely to be found as they travel around the nucleus
a)
Nucleus
b)
Electron Cloud
c)
Within a Proton
d)
Within a Neutron
85.
A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass
a)
Electron Shells
b)
Orbitals
c)
Electron Cloud
d)
Nucleus
86.
Calculation used to find the number of neutrons in an atom
a)
Atomic Mass - Atomic Number
b)
Atomic Number - Atomic Mass
c)
Atomic Mass - Electrons
d)
none of these
87.
These will determine what element an atom is. 
a)
number of neutrons
b)
number of electrons
c)
number of atoms 
d)
number of protons 
88.

An atom is said to be neutral if it has the same number of electrons and ________.

a)

ions

b)

electrons

c)

neutrons

d)

protons

89.

How many protons does one molecule of O2 have?

a)

8

b)

24

c)

16

d)

32

90.
A particle that orbits around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
91.

What does the nucleus of an atom contain?

a)

Electrons and neutrons

b)

Protons and neutrons

c)

Neutrinos and positrons

d)

Electrons and megatrons

92.
The atomic number of an atom is the number of 
a)
protons in its electron cloud
b)
protons in its nucleus
c)
neutrons in its nucleus
d)
electrons and neutrons in the nucleus
93.
All matter is made of what?
a)
energy 
b)
atoms 
c)
volume
d)
compounds 
94.
An atom with atomic number 6 would have how many protons?
a)
6
b)
12
c)
3
d)
cannot be determined 
95.
The two areas of an atom are the 
a)
nucleus and electron cloud
b)
proton cloud and nucleus
c)
inside and outside
d)
mass and volume
96.

How many atoms are in this molecule?

a)

1

b)

2

c)

3

d)

4

97.
Which letter represents a proton?
a)
A
b)
B
c)
C
d)
D
98.
Which letter represents an electron?
a)
A
b)
B
c)
C
d)
D
99.
Which letter represents the nucleus?
a)
A
b)
B
c)
D
d)
E
100.

How many electrons does sulfur have

a)

16

b)

32

c)

48

d)

12

101.
What mass does a neutron have?
a)
1
b)
0
c)
-1
d)
+2
102.
The total number of protons and neutrons in an atom is called the...
a)
Atomic number
b)
Proton number
c)
Mass number
d)
Weight number
103.
How many protons does an aluminium atom have? (Use the image to help you)
a)
27
b)
14
c)
40
d)
13
104.
How many neutrons does a sodium atom have? (Use the image to help you)
a)
23
b)
11
c)
12
d)
34
105.
Atoms of the same element must always have the same number of _________
a)
electrons
b)
neutrons
c)
isotopes
d)
protons
106.
The mass number of an element that has18 protons, 18 electrons, and 19 neutrons is _____.
a)
12.5
b)
13
c)
25
d)
37
107.
This subatomic particle has almost no mass. 
a)
electrons
b)
protons 
c)
neutrons 
d)
sigrons 
108.
What are the two main parts of the atom?
a)
nucleus and cytoplasm
b)
nucleus and electron cloud
c)
core and electron cloud
d)
protons and neutrons
109.

You are given the following information: mass = 105 g; volume = 5 mL. What is the density of this substance?

a)

12 g/mL

b)

21 kg/mL

c)

12 g/L

d)

21g/mL

110.

1mL is equal to ...

a)

1000L

b)

1cm3

c)

1000cm3

d)

1L3

111.

The correct unit for density is...

a)

g/mL3

b)

g/cm3

c)

g/mL

d)

either (c) or (d)

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