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Worksheets

Year 8

Total questions: 118

Worksheet time: 3hrs 36mins

Name
Class
Date
1.
The group number tells us how many _________ there are in an element.
a)
groups
b)
valence electrons
c)
energy levels
d)
chemicals
2.
The ________________ tells you how many energy levels are used in an element.
a)
group number
b)
atom
c)
protons
d)
period number
3.
The element Tellurium has the atomic mass of 127.60 and its atomic number is 52. How many neutrons are in the element Tellurium?
a)
179.60
b)
127.60
c)
52
d)
76
4.
The inner energy level can only hold ______ electrons.
a)
1
b)
0
c)
2
d)
18
5.
The largest amount of electrons the 3rd energy level can hold is?
a)
18
b)
unlimited amount
c)
2
d)
8
6.
The characteristics or properties of metals include
a)
shiny and solid
b)
ductile and malleable
c)
lose electrons
d)
all of the above
7.
True or False - An energy level has to be full before moving on to the next energy level?
a)
true
b)
false
8.
How many valence electrons do elements in group 17 have in their outer energy level?
a)
7
b)
17
c)
1
d)
0
9.
Is the Bohr Model for the element Selenium (Se) correct?
a)
yes
b)
no
10.
Is this a correct representation of the Bohr Model for Sodium (Na)?
a)
no
b)
yes
11.
Which particle does not contribute mass to the atom?
a)
Proton
b)
Neutron
c)
Electron
d)
Nucleus
12.
Which particle contributes the negative charge to the atom?
a)
proton
b)
electron
c)
neutron
d)
nucleus
13.
Water is an element?
a)
true
b)
false
14.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
15.
What is the standard unit of mass at the atomic level?
a)
centimeters
b)
millimeters
c)
amu
d)
milligrams
16.
Paper burning is a __________________ change. 
a)
physical
b)
chemical
17.
Dry ice (solid carbon dioxide) turning into carbon dioxide gas is a 
a)
physical change
b)
chemical change
18.
Which of these phrases describes the results of a chemical change? 
a)
charred wood, ash, and smoke 
b)
salt dissolving in water 
c)
gold nuggets melting 
d)
a dented car door
19.
An iron nail rusting is a _______________ change. The ________________ property of reactivity explains the iron’s ability to form a new substance. 
a)
physical, physical            
b)
physical, chemical 
c)
chemical, chemical 
d)
chemical, physical 
20.

Which example below is a chemical reaction?

a)

ice melting

b)

water boiling

c)

lighting a match

d)

grape juice freezing

21.
The following changes (melting wax, evaporating gasoline, freezing water) are all examples of
a)
nuclear changes.
b)
chemical changes.
c)
physical changes.
d)
a.  energy consumption.
22.

At what part of the atom is the arrow pointing?

a)

nucleus

b)

energy level

c)

electron

d)

proton

23.

At what part of the atom is the arrow pointing?

a)

electron

b)

neutron

c)

proton

d)

nucleus

24.

At what part of the atom is the arrow pointing?

a)

cloud

b)

nucleus

c)

atom

d)

electron

25.

At what part of the atom is the arrow pointing?

a)

Cloud

b)

energy level

c)

electron

d)

neutron

26.

At what part of the atom is the arrow pointing?

a)

proton

b)

neutron

c)

electron

d)

nucleus

27.

At what part of the atom is the arrow pointing?

a)

proton

b)

neutron

c)

electron

d)

nucleus

28.

The mass of an atom is

a)

equal to the number of protons

b)

the protons + electrons

c)

the protons + neutrons

d)

the protons + neutrons + electrons

29.

In a neutral atom,

a)

protons = electrons

b)

protons = neutrons

c)

neutrons = electrons

d)

protons = neutrons = electrons

30.

Which particle identifies the identity of the atom

a)

protons

b)

neutrons

c)

electrons

d)

protons and electrons

31.

all the mass of an atom is located in

a)

the energy level

b)

the cloud

c)

the nucleus

d)

atom

32.

Which number shows the atomic number?

a)

2

b)

4.0026

c)

4

d)

HE

33.

The short or abbreviated way to write an element:

a)

Address

b)

Nickname

c)

Symbol

d)

Code

34.

The sum of protons and neutrons around the nucleus

a)

atomic number

b)

mass number

c)

average atomic mass

d)

mass amount

35.

Atoms that have a different amount of electrons than protons

a)

covalent bonds

b)

isotopes

c)

ionic bonds

d)

ions

36.

Atoms with the same number of protons but different number of neutrons.

a)

covalent bonds

b)

isotopes

c)

ionic bonds

d)

ions

37.

What charge does the nucleus have?

a)

Negative

b)

Postitive

c)

Neutral

d)

Visa/Amex

38.

Which subatomic particles have the least mass?

a)

Neutrons

b)

Protons

c)

Electrons

d)

Atoms

39.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
40.
In a correctly written symbol what would be located in the "A" position?
a)
number of neutrons
b)
atomic number
c)
number of electrons 
d)
mass number
41.

12 protons, 10 electrons, 12 neutrons

a)

24Mg−2^{24}Mg^{-2}

b)

24Cr+2^{24}Cr^{+2}

c)

24Cr−2^{24}Cr^{-2}

d)

24Mg+2^{24}Mg^{+2}

42.
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
43.
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
44.
What is the atomic number of this atom?
a)
1
b)
3
c)
4
d)
7
45.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

46.

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

47.

Atoms of the same element which have a different number of neutrons are called _________________.

a)

ions

b)

isotopes

c)

quarks

d)

molecules

48.

Isotopes have different numbers of

a)

protons

b)

neutrons

c)

electron

d)

properties

49.

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

a)

0

b)

1

c)

10

d)

5

50.

How many electrons are in an atom with an atomic number of 50?

a)

5

b)

8

c)

50

d)

2

51.

Tiny particles that make up matter

a)

atoms

b)

ions

c)

molecules

52.

Atoms are composed of __________ particles.

a)

subatomic

b)

positive

c)

matter

d)

neutral

53.

Which subatomic particle has no charge?

a)

neutron

b)

proton

c)

electron

54.

Which subatomic particle has a positive charge?

a)

proton

b)

neutron

c)

electron

55.

Which subatomic particle has a negative charge?

a)

proton

b)

neutron

c)

electron

56.

Which subatomic particles are found in the nucleus?

a)

protons and electrons

b)

neutrons and electrons

c)

protons and neutrons

57.

Which subatomic particles are included in the atomic mass?

a)

protons only

b)

protons and neutrons

c)

protons and electrons

58.

Which subatomic particle does not have a significant affect on the atom's mass?

a)

protons

b)

neutrons

c)

electrons

59.

The center of the atom

a)

nucleus

b)

neutron

c)

electron cloud

d)

orbitals

60.

The Group 1 elements are considered............................

a)

metal

b)

metalloids

c)

nonmetals

61.

The boiling points of the Group 1 elements decrease from top to bottom of the group.

a)

true

b)

false

62.

The Group 1 elements have low densities compared to most other metals.

a)

true

b)

false

63.

The Group 1 elements reacts with water.


to produce ................... and .................

a)

hydrogen gas

b)

alkaline solution

c)

oxygen gas

d)

acidic solution

64.

sodium + water ==>

a)

sodium hydrgen + hydrogen

b)

sodium hydroxide + hydrogen

c)

sodium hydroxide + oxygen

d)

sodium hydroxide + oxide

65.

potassium + water ==>

a)

potassium + hydrogen

b)

potassium + oxygen

c)

potassium hydroxide + hydrogen

d)

potassium hydroxide + oxygen

66.

Group 1 metals are shiny when freshly cut.

a)

False

b)

True

67.

potassium + …………………………….. ==>

potassium hydroxide + hydrogen

a)

water

b)

oxygen

c)

nitrogen

d)

hydroxide

68.

Which element in Group1 has the highest melting point?

a)

Cesium

b)

Francium

c)

Lithium

d)

Sodium

69.

Among Group 1 element, it has the lowest density?

a)

Gold

b)

Francium

c)

Lithium

d)

Sodium

70.

Group 1 elements are also known as

a)

Noble gas

b)

Halogen

c)

Alkaline earth metals

d)

Alkali metals

71.

Arrange the elements in group 1 from the top to bottom of the group.

a)

Li, Na, K, Fr, Rb, Cs

b)

Li, Na, K, Rb, Fr, Cs

c)

Li, Na, K, Rb, Cs, Fr

d)

Fr, Cs, Rb, K, Na, Li

72.

What gas is given off when group 1 elements reacts with water?

a)

Hydrogen

b)

Oxygen

c)

Carbon dioxide

d)

Helium

73.

How many electrons are in the outer shell of group 1 elements?

a)

0

b)

1

c)

2

d)

3

74.
Which of the following is the most reactive in water?
a)
Lithium
b)
Sodium
c)
Potassium
75.
Which of the following is NOT an alkali metal
a)
Li
b)
Cl
c)
K
d)
Cs
76.
________ are the COLUMNS on the periodic table and are organized by similar properties.
a)
Classifications
b)
Groups
c)
Periods
d)
Elements
77.

Used as a coolant in nuclear power stations.

a)

Francium

b)

Sodium

c)

Cesium

78.

The gas killed 5000 people in the First World War.

a)

chlorine

b)

iodine

c)

bromine

d)

fluorine

79.

.................. poisons all living things.

a)

chlorine

b)

iodine

c)

bromine

d)

fluorine

80.

destroy viruses and bacteria in water, making it safe to drink.

a)

chlorine

b)

iodine

c)

bromine

d)

fluorine

81.

destroys bacteria around cuts.

a)

chlorine

b)

iodine

c)

bromine

d)

fluorine

82.

Iron + chlorine ==> ...........................

a)

iron chloride

b)

iron chlorine

c)

iron + chlore

d)

all are wring

83.

Going down this group, the number of protons in atoms of the elements increases.

a)

Group 1

b)

Group 7

c)

Both are true

d)

Both are false

84.

Atoms of the elements in this group form molecules made up of two atoms.

a)

Group 1

b)

Group 7

c)

Both are true

d)

Both are false

85.

Going up this group, the colours of the elements get lighter.

a)

Group 1

b)

Group 7

c)

Both are true

d)

Both are false

86.

The elements at the top of this group are gases.

a)

Group 1

b)

Group 7

c)

Both are true

d)

Both are false

87.

The elements in this group conduct electricity.

a)

Group 1

b)

Group 7

c)

Both are true

d)

Both are false

88.

All the atoms of the elements in this group have the same number of electrons in the outermost shell.

a)

Group 1

b)

Group 7

c)

Both are true

d)

Both are false

89.

What name is given to elements in Group 7 on the periodic table?

a)

Alkali metals

b)

Halogens

c)

Alkali Earth Metals

d)

Metalloids

90.

Which of the "Halogens" is found in liquid state at room temperature?

a)

Flourine

b)

Astatine

c)

Iodine

d)

Bromine

91.

Which of these is a use for chlorine?

a)

in cosmetics

b)

in foods

c)

in cleaning equipment

d)

in clothing

92.

What colour is bromine?

a)

red-brown

b)

purple

c)

yellow-green

d)

yellow

93.

True or false? Halogens are metals.

a)

True

b)

False

94.

As you move down the group, halogens' reactivity...

a)

increases

b)

decreases

c)

doesn't change

d)

shows no trend.

95.

Which is the most reactive element in Group 7?

a)

Flourine

b)

Chlorine

c)

Bromine

d)

Astatine

96.

A displacement reaction involves...

a)

a solution turning brown or yellow.

b)

a less reactive element taking the place of a more reactive element.

c)

a dislocated hip.

d)

a more reactive element taking the place of a less reactive element.

97.

Would a displacement reaction occur for Bromine + Potassium Iodide?

a)

Yes

b)

No

c)

Maybe

98.

Which of the "Halogens" has yellowish green color?

a)

Chlorine

b)

Bromine

c)

Flourine

d)

Iodine

99.

Which halogen would be able to replace chlorine in sodium chloride?

a)

Flourine

b)

Bromine

c)

Iodine

d)

Astatine

100.

The melting and boiling point increases as you go down group 7

a)

true

b)

false

101.

Iron + copper oxide =

a)

Iron + copper oxide

b)

Iron oxide + copper oxide

c)

Iron oxide + copper

d)

Magic

102.

Which of the following is more reactive?

a)

Calcium

b)

Magnesium

c)

Zinc

d)

Magnesium

103.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
104.

Will the following reaction take place?


Ni + NaCl ->

a)

NO

b)

YES

105.

Which one of the following combinations result in a displacement reaction?

a)

Iron with magnesium chloride

b)

magnesium with iron chloride

c)

Iron with Zinc Sulphate

d)

gold with silver nitrate

106.
A displacement reaction will occur when...
a)
a more reactive metal displaces a less reactive metal from its compound.
b)
A less reactive metal displaces a more reactive metal from its compound
c)
Displacement only occurs when two of the same metals are reacted 
d)
Displacement reactions will only occur in metals above iron in the reactivity series
107.

What will the products of this reaction be?

calcium + zinc nitrate --------->

a)

Calcium + zinc nitrate

b)

Zinc + calcium nitrate

c)

there will be no reaction

d)

Zinc + calcium chloride

108.
Which of the following will not undergo reaction?
a)
zinc metal  +  zinc oxide 
b)
iron metal  +  copper oxide
c)
zinc metal +  iron oxide
d)
magnesium  +  iron oxide
109.

True or false? Chemical reactions are easily reversible

a)

True

b)

False

110.

True or false: A change in state is a chemical reaction

a)

True - something melting would be an example of a chemical reaction

b)

False - a change in state is a physical change

111.

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

a)

reactants

b)

products

c)

ingredients

112.

When energy is transferred from the substances to the surroundings during a chemical reaction, what type of reaction is this?

a)

endothermic

b)

exothermic

c)

decomposition

d)

combustion

113.

Which is NOT an example of something you could observe that would suggest a chemical reaction is taking place?

a)

melting

b)

fizzing

c)

smells

d)

temperature change

114.
When metal reacts with liquid water the products are...
a)
metal hydroxide and oxygen gas
b)
metal hydroxide and hydrogen gas
c)
metal oxide and oxygen gas
d)
metal oxide and hydrogen gas
115.
What is made when magnesium reacts with hydrochloric acid?
a)
magnesium nitrate and hydrogen gas
b)
magnesium sulfate and hydrogen gas
c)
magnesium oxide and oxygen gas
d)
magnesium chloride and hydrogen gas
116.
What environmental element assists rusting?
a)
nitrogen
b)
carbon
c)
oxygen
d)
hydrogen
117.
Metals that react quickly/strongly with water and acids are called?
a)
Reactive
b)
Unreactive
c)
Dangerous
d)
Corrosive
118.
Which gas is required for something to burn?
a)
Carbon dioxide 
b)
Hydrogen 
c)
Oxygen 
d)
Water 

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