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Chemistry Year 8

Total questions: 80

Worksheet time: 57mins

Name
Class
Date
1.

protons

a)

negative charge, nucleus

b)

positive charge, shells

c)

positive charge , nucleus

d)

neutral charge, nucleus

2.

what is an atom

a)

smallest part of the universe

b)

smallest part of a substance

c)

smallest part of anything

d)

smallest part of water

3.

neutrons

a)

no charge, shells

b)

positive charge, nucleus

c)

no charge, nucleus

d)

negative charge, shells

4.

electrons

a)

no charge, nucleus

b)

positive charge, nucleus

c)

negative charge, shells

d)

negative charge, nucleus

5.

same number of protons, different number of neutrons

a)

atomic number

b)

mass number

c)

isotope

d)

ion

6.

a charged atom

a)

neutral

b)

isotope

c)

ion

d)

nucleus

7.
Water is an element?
a)
true
b)
false
8.
Milk turning sour
a)
Chemical Change
b)
Physical Change 
9.
Melting Ice 
a)
Chemical Change 
b)
Physical Change 
10.
What is the study of the composition, structure, and properties of MATTER?
a)
Chemistry
b)
Biology
c)
Geology
d)
Physics
11.
Anything that takes up space and has mass is known as _______________.
a)
Matter
b)
Molecules
c)
Compounds
d)
Stuff
12.

An electron is smaller than an atom.

a)

True

b)

False

c)

Whic

13.

An atom's atomic number will tell you how many protons and electrons it has.

a)

True

b)

False

14.

Evidence of a chemical change includes:

a)

Color changes

b)

Temperature changes

c)

Small explosions

d)

All of the above

15.
How do liquid water, ice, and water vapor differ from each other?
a)
They are different states of matter.
b)
They are different compounds.
16.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
17.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
18.
Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –
a)
a gas at room temperature.
b)
made of two different elements.
c)
given off by green plants.
d)
useful to human beings.
19.
How many protons does this atom have?
a)
2.5
b)
6
c)
5
d)
10.811
20.
What part of the atom is the arrow pointing to?
a)
nucleus
b)
proton
c)
electron shell
d)
electron
21.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
22.
A combination of substances that are not chemically combined is called a(n)____________. 
a)
mixture
b)
compound
c)
physical
23.
An element is made up of only one kind of _____.
a)
isotope
b)
plastic
c)
atom
d)
metal
24.
What subatomic particles would you find in the nucleus of an atom?
a)
Protons only
b)
Protons and Neutrons
c)
Neutrons and Electrons
d)
Protons and Electrons 
25.
What are the 3 subatomic particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
26.
What subatomic particle(s) would be found orbiting the nucleus?
a)
Neutrons only
b)
Electrons only
c)
Protons and Neutrons
d)
Protons and Electrons
27.
What are the states of matter?
a)
solid, liquid, and juice
b)
solid and liquid
c)
solid and gas
d)
solid, liquid, and gas
28.
The molecules in the picture are tightly held together with little movement. They have shape and energy.  Therefore, the picture represents _________.
a)
solid
b)
liquid
c)
gas
d)
plasma
29.
When the temperature of matter increases the particles...
a)
speed up and move closer
b)
speed up and move farther apart
c)
slow down and move closer together
d)
slow down and move farther apart
30.
Molecules are closest together in a 
a)
Solid
b)
Liquid
c)
Gas
d)
plasma
31.
What does this picture represent? 
a)
solid
b)
liquid
c)
gas
d)
plasma
32.
Freezing
a)
Solid to gas
b)
Liquid to solid
c)
Gas to solid
d)
Liquid to gas
33.
Define a liquid.
a)
Indefinite shape, indefinite volume
b)
Definite shape, definite volume
c)
Found in stars
d)
Definite volume, indefinite shape
34.
What is condensation?
a)
gas to solid
b)
gas to liquid
c)
liquid to solid 
d)
solid to liquid 
35.
According to the law of conservation of mass...
a)
sometimes atoms are lost
b)
sometimes atoms are gained
c)
atoms are never lost nor gained
d)
atoms are lost and gained
36.
Which of the following is a chemical change?
a)
the rusting of iron
b)
dissolving salt in water
c)
melting an ice cube
d)
bending a copper wire
37.
Which is an example of a physical change?
a)
sodium and chlorine form salt
b)
a copper ring turns white and green
c)
a log burns in a fire
d)
using sand and water to build a sand castle on a beach
38.
What is the chemical symbol for the element hydrogen
a)
H
b)
He
c)
h
d)
he
39.
What is the chemical symbol for the element Silicon
a)
S
b)
Si
c)
si
d)
Sl
40.
What is the chemical symbol for the element copper?
a)
co
b)
c
c)
Cu
d)
cu
41.
What is the chemical symbol for the element Nitrogen
a)
Ni
b)
N
c)
No
d)
Nb
42.
What is the chemical symbol for the element Chlorine
a)
C
b)
Cl
c)
cl
d)
Ch
43.
What element is represented by the Chemical symbol Mg
a)
Manganese
b)
Magnesium
c)
Molybdenum
d)
Mitrium
44.
What is the chemical symbol for the element Calcium
a)
C
b)
Ca
c)
Cl
d)
CL
45.
Which of these statements are true?
a. A mixture is made up of different substances that are chemically joined together.
b. You cannot change the amounts of substances in a mixture.
c. A pure substance has no other substance mixed with it.
a)
a, b and c
b)
only b and c
c)
only a
d)
only c
46.
At higher temperatures
a)
particles in an object have less energy
b)
particles in an object move faster
c)
a gas contracts
47.

Which of the following is a correct description for solids?

a)

closely arranged and in fixed positions

b)

closely arranged and vibrate in fixed positions

c)

closely arranged and can move around

48.
Which of the following statements about the particle of a gas is true?
a)
Gases can be compressed because their particles are smaller than those of liquids or solids.
b)
Gases can be compressed because there is plenty of space between their particles.
c)
Gases can be compressed because they have low boiling points.
d)
Gases can be compressed because their particles are more elastic than those of liquids or solids.
49.

Particles are always moving.

a)

True

b)

False

50.

What is MATTER?

a)

Anything that has MASS

b)

Anything that takes up SPACE

c)

Anything that has MASS and takes up SPACE

d)

Anything that DOES NOT have mass or take up space

51.

All matter is made up of tiny _______________

a)

energy

b)

particles (atoms and molecules)

c)

bits

d)

antimatter

52.
What does the particle diagram show?
a)
solid
b)
liquid
c)
gas
d)
plasma
53.

Particles always ________________ each other, this gets stronger as the particles get ___________________.

a)

attract, farther apart

b)

attract, closer together

c)

repel, farther apart

d)

repel, closer together

54.

Diagram 7 shows a graph of the volume of gas produced against time for the reaction between zinc granules and hydrochloric acid.


The gradient of the graph decreases with time because

a)

catalyst is not used

b)

volume of mixture decreases

c)

temperature of reaction decreases

d)

concentration of hydrochloric acid decreases

55.

Increase in temperature causes the particles to

a)

slow down

b)

move faster

c)

stay apart from each other

d)

move in the correct order

56.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of reactant particles

d)

it increases the frequency of collision

57.

Why does a higher temperature increase the rate of a reaction?

a)

It increases both the frequency collision and energy of reactant particles

b)

It only increases the frequency of collision

c)

It only increases the energy of reactant particles

d)

It reduces the activation energy of the reaction

58.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
59.

Grinding an effervescent tablet into powder increases the rate of reaction due to increase of

a)

concentration

b)

total surface area

c)

temperature

d)

size

60.

Which factors increase the rate of a reaction?

a)

increasing temperature

b)

increasing concentration

c)

increasing total surface area

d)

All of these

61.

Increasing the temperature gives particles more __________.

a)

time

b)

energy

c)

space

d)

frequency

62.

You add more bodies into a "mosh pit" to hope for more collisions. You have increased

a)

temperature

b)

concentration

c)

pressure

d)

catalyst

63.

Why does breaking up a solid reactant increase the rate of reaction?

a)

it creates more solid

b)

it creates more energy

c)

it increases the total surface area

d)

it increases the concentration

64.

List three factors that affect the rate of a reaction

a)

temperature

b)

concentration

c)

surface area

d)

volume

65.

The atomic # tells us the # of ____________________ in an atom.

a)

protons

b)

electrons

c)

neutrons

d)

Cassietrons

66.

The mass # tells us the mass of the atom. Which two subatomic particles make up the mass of the atom?

a)

protons and electrons

b)

neutrons and electrons

c)

Kyrontrons and Kytrons

d)

protons and neutrons

67.

What can you do to find the number of neutrons in an atom?

a)

It's the same as the atomic #.

b)

Ask Sierra!

c)

Subtract the atomic # (protons) from the mass # (protons and neutrons)

d)

Multiply the mass # (protons and neutrons) and the atomic # (protons)

68.

The number of electrons is usually the same as the number of protons.

a)

True

b)

False

c)

Only Abraham knows...

69.

What do we call protons, electrons, and neutrons as a group?

a)

Billy Bob Emilys

b)

subatomic particles

c)

Spiral-shaped yeast buns

d)

periodic table of the elements

70.

Carbon has how many protons?

a)

12

b)

6

c)

7

d)

4

71.

Bromine has how many Neutrons?

a)

35

b)

80

c)

45

d)

8

72.

Oxygen has a mass of...

a)

8

b)

16

c)

15

d)

6

73.

Arsenic has a mass of _______

a)

33

b)

79

c)

75

d)

47

74.

How many protons are in Gold

a)

79

b)

197

c)

118

d)

276

75.

How many neutrons are in Tungsten

a)

110

b)

74

c)

183

d)

258

76.

If Hydrogen has an atomic number of 1 and a mass unit of 1 How many protons does it have?

a)

1

b)

2

c)

3

d)

4

77.

If Helium has an atomic number of 2 and an atomic mass of 4. How many protons does it have?

a)

1

b)

2

c)

3

d)

4

78.

The element Beryllium has an atomic number of 4 and an atomic mass of 9. How many Protons?

a)

1

b)

2

c)

3

d)

4

79.

The lithium element has an atomic number of 3 and an atomic mass of 7. How many protons does it have?

a)

1

b)

2

c)

3

d)

4

80.

How many protons does the element in this image contain?

a)

14

b)

7

c)

15

d)

18

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