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Y9 Atomic Structure and Chemical Reactions Revision

Total questions: 150

Worksheet time: 2hrs 30mins

Name
Class
Date
1.

This picture represents a

a)

neutron

b)

electron

c)

proton

d)

atom

2.

What is the mass number of the element nitrogen? It has 7 protons, 7 neutrons, and 7 electrons.

a)

7

b)

14

c)

21

3.

Elements are pure substances. They are made up of

a)

only 1 type of atom.

b)

2 types of atoms.

c)

more than 2 types of atoms.

4.

The green subatomic particles with negative charges are

a)

protons

b)

neutrons

c)

electrons

d)

atoms

5.

___________ has mass and takes up space.

a)

Chemistry

b)

Matter

c)

Heat

d)

Light

6.

Silicon has a mass number of 28 and an atomic number of 14. How many protons does it have?

a)

28

b)

14

c)

42

d)

7

7.

Electrons, protons, and neutrons are

a)

elements

b)

pure substances

c)

subatomic particles

d)

all the same

8.

Which is true of neutrons?

a)

They have a positive charge and are located in the nucleus.

b)

They have no charge and are located in the nucleus.

c)

They have a negative charge and are located in orbit.

d)

They have no charge and located in orbit.

9.

How many protons, neutrons, and electrons does sulfur have? It's atomic number is 16 and it's atomic mass is 32.

a)

16 protons, 16 neutrons, and 16 electrons

b)

16 protons, 32 neutrons, and 16 electrons

c)

16 protons, 16 neutrons, and 32 electrons

d)

32 protons, 16 neutrons, and 16 electrons.

10.

The nucleus

a)

is located in the orbit of the atom.

b)

has a negative charge.

c)

is the center of the atom.

d)

has all the subatomic particles.

11.

Protons and neutrons

a)

are located in orbit.

b)

both have no charge.

c)

are located in the nucleus.

d)

both have a negative charge.

12.

How many protons does chlorine have?

a)

35

b)

36

c)

17

d)

18

13.

Atom that is no longer neutral because it has gained or lost electrons.

a)

neutral atom

b)

ion

c)

isotope

14.

The ________ is the small area in the center of an atom in which most of an atom's mass and positive charge is concentrated.

a)

electron cloud

b)

nucleus

c)

neutron

d)

proton

15.

What is an atomic particle with no charge?

a)

an electron

b)

a neutron

c)

an atom

d)

a quark

16.

What is an atomic particle with one positive charge?

a)

an electron

b)

a proton

c)

an atom

d)

a quark

17.

The smallest piece of an element that still represents that element is

a)

an electron

b)

a proton

c)

an atom

d)

a quark

18.

What is nuclear decay?

a)

The process of gaining or losing electrons

b)

The process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation

c)

The increase in the mass number of an atom

d)

The process of an atom splitting into two or more smaller atoms

19.

What does the term "radioactive" describe?

a)

Elements that emit radiation when exposed to external force

b)

Elements that spontaneously emit radiation

c)

Elements that are stable and do not emit radiation

d)

Elements that absorb radiation

20.

What is the mass number?

a)

The number of protons in an atom

b)

The average mass of an element's isotopes

c)

The number of neutrons in an atom

d)

The sum of protons and neutrons in an atom

21.

What is an isotope?

a)

An atom that has gained or lost electrons

b)

An atom with a different number of protons

c)

Any of two or more atoms of the same element that have different numbers of neutrons

d)

The smallest piece of an element that still represents the element

22.

What does the atomic number of an element represent?

a)

The sum of protons and neutrons in an atom

b)

The average mass of an element's isotopes

c)

The number of protons in an atom of an element

d)

The number of neutrons in an atom

23.

What is an electron?

a)

Neutral particle in the nucleus of an atom

b)

Atomic particle with one positive charge (1+)

c)

Atomic particle with one negative charge (1-)

d)

Smallest piece of an element that still represents the element

24.
Two or more atoms chemically bonded together are called a
a)
atom
b)
element
c)
molecule
d)
mixture
25.
How many hydrogen atoms are there in a water molecule? 
a)
0
b)
1
c)
2
d)
3
26.
A molecule is made up of ____ or more atoms.
a)
1
b)
2
c)
3
d)
4
27.

The image shows the periodic grid of potassium. How many electrons are found in the potassium atom?

a)

19

b)

20

c)

39

d)

40

28.

Which part of an atom is represented by the blue circles?

a)

electrons

b)

neutrons

c)

protons

29.

Which part of an atom is represented by the orange circles?

a)

electrons

b)

neutrons

c)

protons

30.

Which part of an atom is represented by the green circles?

a)

neutrons

b)

protons

c)

electrons

31.

What is the picture displayed?

a)

compound

b)

element

c)

molecule

32.

How many elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

6

33.

The atomic number of Neon is 20

a)

True

b)

False

34.

Which of the statements is incorrect about the image?

a)

The mass number is 31

b)

It has 15 electrons

c)

The element name is potassium

d)

It has 16 neutrons

35.

Write, in words, how many neutrons beryllium has

(a)  

36.

How would H2O be classified? Check all that apply.

a)

Atom

b)

Molecule

c)

Compound

37.

What is an ion?

a)

An atom that has gained or lost an electron.

b)

An atom that has gained or lost a neutron.

c)

An atom that has gained or lost a proton.

d)

An atom that is electrically neutral.

38.
What do these isotopes of carbon all have in common?
a)
neutrons & mass number
b)
atomic number and neutrons
c)
atomic number and electrons
d)
protons, atomic number, and mass number
39.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
40.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
41.
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
42.
What quantities vary between isotopes of an element?
a)
protons, electrons, and atomic mass
b)
protons, electrons, and atomic number
c)
neutrons and electrons
d)
neutrons and atomic mass
43.

Which atom has 4 neutrons?

a)

Li-6

b)

Li-7

c)

Li-8

d)

they have the same # of neutrons

44.
How many neutrons in C-14?
a)
6
b)
7
c)
14
d)
8
45.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
46.
Two isotopes of carbon are carbon-12 and carbon-14.  These isotopes differ from one another by two protons.
a)
true
b)
false
47.

Bromine-80 has how many neutrons?

a)

41

b)

42

c)

44

d)

45

48.

How do you calculate mass number?

a)

Mass x percent

b)

Protons + Electrons

c)

Protons + Neutrons

d)

Neutrons + Protons + Electrons

49.
Fluorine has an atomic number of 9. What can you conclude about an atom of fluorine from this fact?
a)
it has 9 protons
b)
it weighs 9 grams
c)
it has 9 electron shells
d)
it has a boiling point of 9 degree celsius
50.
If a sulfur atom has 16 protons, 16 electrons, and 16 neutrons, its atomic mass is:
a)
16
b)
32
c)
48
d)
64
51.
If a hydrogen atom has 1 proton, 1 electron, and 1 neutron, its atomic number is:
a)
1
b)
2
c)
3
d)
4
52.
How many neutrons does a Calcium 48 isotope have?
a)
16
b)
20
c)
28
d)
12
53.

A radioactive atom is any atom that contains an unstable _____.

a)

energy level

b)

nucleus

c)

orbital

d)

electron

54.

What is the mass number of this isotope?

a)

131

b)

53

c)

184

d)

78

55.

An alpha particle is made up of

a)

2 protons and 4 neutrons

b)

1 proton and 1 neutron

c)

2 protons and 2 neutrons

d)

4 protons and 2 neutrons

56.
When a nucleus undergoes nuclear decay by gamma rays, the atomic number of the element....
a)
remains the same
b)
  decreases by one.
c)
increases by one.
d)
increases by two.
57.
In the symbol 20682Pb what does 206 stand for?
a)
Mass number
b)
Atomic number
c)
Atomic mass
d)
Number of protons
58.
The three types of nuclear radiation in increasing order of penetrating power are ____.  
a)

alpha, beta, gamma 

b)
X ray, beta, gamma
c)
alpha, gamma, beta 
d)
X ray, gamma, beta 
59.

What is an isotope

a)

An atom with the same number of neutrons different number of protons

b)

An atom that has lost or gained an electron

c)

An atom with the same number of protons, different number of neutrons

d)

An atom with the same number of electrons and different neutrons

60.

The diagram shows radioactive waste thrown into the ocean that causes mutations in aquatic life. Why does this happen?

a)

Radiation can damage cells & DNA

b)

The energy released heated the seawater.

c)

The fish used the radiation to treat cancer.

61.

Radiation therapy can be used to treat what condition?

a)

acne

b)

cancer

c)

indigestion

62.

The term given to unstable radioactive atoms.

a)

Parent

b)

Daughter

c)

Half Life

d)

Igneous

63.

The % of the parent isotope remaining after 3 Half Lives.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

64.

The % of the parent isotope remaining after 1 Half Life.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

65.

The % of the parent isotope remaining after 2 Half Lives.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

66.

After one half life, a sample will begin to have more of the parent isotope than the daughter isotope.

a)

TRUE

b)

FALSE

67.

The diagram shows 32 atoms

32 of the Red are the parent isotope

0 of the atoms are daughter isotopes

How many half-lives have occurred?

a)

0

b)

1

c)

2

d)

3

68.

The diagram shows 32 atoms.

16 of the Red are parent isotopes

16 of the Green are daughter isotopes

How many half-lives have occurred?

a)

0

b)

1

c)

2

d)

3

69.

The diagram shows 32 atoms

8 of the Red are parent isotopes

24 of the Green are daughter isotopes

How many half-lives have occurred?

a)

0

b)

1

c)

2

d)

3

70.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

71.

What is the Half Life of this isotope?

a)

3 days

b)

5 days

c)

8 days

d)

10 days

72.

The Half Life of Californium 252 is 5 years.

a)

TRUE

b)

FALSE

73.

An alpha particle consists of:

a)

2 protons

b)

A high speed electron

c)

A wave

d)

2 protons and 2 neutrons

74.

Beta radiation is:

a)

2 protons

b)

A high speed electron

c)

A wave

d)

2 protons and 2 neutrons

75.

Gamma radiation is:

a)

2 protons

b)

A high speed electron

c)

A wave

d)

2 protons and 2 neutrons

76.

Alpha is stopped by:

a)

Thick lead

b)

Thin paper

c)

A few cm of air

d)

Aluminium

77.

Beta is stopped by:

a)

Aluminium

b)

Paper

c)

Lead

d)

Concrete

78.

Gamma is mostly stopped by:

a)

A few cm of air

b)

Thick lead

c)

Aluminium

d)

Paper

79.

The rate at which nuclear decay takes place is called:

a)

gamma decay

b)

quarter life

c)

half-life

d)

isotope

80.

Acids are neutralised by...

a)

Bases

b)

Metals

c)

Water

d)

Hydrogen gas

81.

Bases are neutralised by...

a)

Acids

b)

Metals

c)

Water

d)

Hydrogen gas

82.

Acids have a pH

a)

greater than 7

b)

lower than 7

c)

equal to 7

83.

Bases have a pH...

a)

greater than 7

b)

lower than 7

c)

equal to 7

84.

When equal amounts of acid are mixed with a base they produce a solution with a pH...

a)

Greater than 7

b)

Lower than 7

c)

Equal to 7

85.

Acids release...

a)

Hydrogen ions

b)

Hydroxide ions

c)

Sodium ions

d)

Hydrogen gas

86.

Bases release...

a)

H+

b)

OH-

c)

H2

87.

Neutral solutions have a pH of:

a)

0

b)

1

c)

7

d)

14

88.

Which is true?

a)

pH of less than 7 is basic; pH of more than 7 is acidic

b)

pH of less than 7 is acidic; pH of more than 7 is basic

89.

Vinegar, fruit juice, and cola are examples of:

a)

strong acids

b)

strong bases

c)

strong bases

d)

weak acids

90.

NaOH may be found in drain cleaners and as a component of soaps. Is NaOH an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

91.

pH is the measure of the concentration of ______.

a)

Acids

b)

H+ ion

c)

OH- ion

d)

Bases

92.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

93.
When found in food, acids are ________
a)
Sour
b)
Bitter
c)
Salty
d)
Slippery
94.
What does corrosive mean?
a)
That a substance is a strong base.
b)
That a substance is neutral.
c)
That a substance can easily wear away
d)
The substance is the strongest acid
95.

Metal + Acid -> ___ + ___

a)

Salt + Hydrogen

b)

Metal Hydroxide + Hydrogen

c)

Metal Oxide + Hydrogen

d)

Metal Carbonate + Hydrogen

96.

Sodium + Hydrochloric acid ->

a)

Sodium chlorine

b)

Sodium chlorine + hydrogen

c)

Sodium chloride + hydrogen

d)

Sodium chloride

97.

Lithium + nitric acid ->

a)

Lithium nitride + hydrogen

b)

Lithium nitric + hydrogen

c)

Lithium nitrogen + hydrogen

d)

Lithium nitrate + hydrogen

98.

Zinc + sulphuric acid ->

a)

hydrogen + Zinc sulphate

b)

Zinc sulphide + hydrogen

c)

Zinc Sulphur + hydrogen

d)

Zinc sulphate + helium

99.

What is always a product when a metal reacts with an acid?



(a)  

100.

___ + _____ -> sodium nitrate + hydrogen

a)

Sodium + nitric acid

b)

Sodium + nitrate

c)

Sodium + sulphuric acid

d)

Sodium + hydrochloric acid

101.

Lead + ____ -> Lead sulphate + hydrogen

a)

nitric acid

b)

sulphuric acid

c)

hydrochloric acid

d)

citric acid

102.

Hydrochloric acid + (a)   -> Iron Chloride + hydrogen

103.

When a metal + acid react, hydrogen and what is produced?

(a)  

104.

The formation of a new substance is an example of

a)

a chemical reaction

b)

a physical change

105.

The materials produced by a chemical reaction are called

a)

ingredients

b)

products

c)

materials

d)

reactants

106.

Total number atoms in reactants = total number atoms in products

a)

True

b)

False

107.

In elephants toothpaste a chemical reaction occurs

hydrogen peroxide → water + oxygen gas

Which of the following indicates the reactant(s)?

a)

water and oxygen gas

b)

hydrogen peroxide, water and oxygen gas

c)

hydrogen and peroxide

d)

hydrogen peroxide

108.

In elephants toothpaste a chemical reaction occurs

hydrogen peroxide → water + oxygen gas

Which of the following indicates the products(s)?

a)

water and oxygen gas

b)

hydrogen peroxide, water and oxygen gas

c)

hydrogen and peroxide

d)

hydrogen peroxide

109.

*choose multiple answers*

In the experiment 'elephants toothpaste' a chemical reaction occurs. What signs were there that a chemical reaction had occurred?

a)

temperature change

b)

the atoms were seen moving

c)

precipitate formed

d)

release of gas

110.

In an endothermic reaction, energy is _________.

a)

absorbed

b)

released

111.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

112.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

113.

During an exothermic reaction, heat is _________ and chemical bonds __________.

a)

released, formed

b)

absorbed, broken

c)

released, broken

d)

absorbed, formed

114.

During an endothermic reaction, heat is ________ and chemical bonds _______.

a)

released, formed

b)

absorbed, broken

c)

released, broken

d)

absorbed, formed

115.

Exo means out or ________.

a)

absorbed

b)

released

116.

Endo means in or _______.

a)

absorbed

b)

released

117.
'Have you ever eaten sherbet sweets? They fizz in your mouth and your tongue feels cold. Why do you think that is?'
a)
It is an exothermic reaction
b)
It is an endothermic reaction
c)
It is made of ice
d)
It is dissolving your mouth
118.

What instrument would you use to detect an endothermic or exothermic reaction?

a)

triple beam balance

b)

ruler

c)

thermometer

119.

A melting ice cube is an example of

a)

exothermic

b)

endothermic

c)

none

d)

both

120.

Frying an egg is an example of

a)

exothermic reaction

b)

endothermic reaction

c)

both

d)

none

121.

Energy is released during the process of cellular respiration. This is an example of an ___________ reaction.

a)

endothermic

b)

exothermic

122.

The graph above is from which type of reaction?

a)

Endothermic reaction

b)

Exothermic Reaction

123.

The graph above is from which type of reaction?

a)

Endothermic reaction

b)

Exothermic reaction

124.

A sunflower makes food during photosynthesis.

a)

exothermic

b)

endothermic

125.

What is NOT product of complete combustion?

a)

carbon dioxide

b)

water

c)

carbon monoxide

d)

water

126.

This type of combustion occurs when there is a limited supply of oxygen

a)

Complete Combustion

b)

Incomplete Combustion

127.
Another term for burning is
a)
Fire triangle
b)
Magnesium oxide
c)
Combustion
d)
Bustion
128.

The product(s) of complete combustion of any hydrocarbon is/are _________________.

I. water

II. carbon dioxide

III. carbon monoxide

a)

I

b)

III

c)

I and II

d)

I and III

129.

Incomplete combustion is harmful to humans because it ___________________.

a)

increases the level of sugar in the blood

b)

produces large amounts of carbon dioxide

c)

decreases the amount of sugar in the blood

d)

produces carbon monoxide that reduces the level of oxygen in the blood

130.
Is combustion a reversible reaction?
a)
Yes.
b)
No.
131.
The word equation for combustion is: fuel + oxygen --> water + ________ __________
a)
Carbon dioxide
b)
Limewater
132.
Complete combustion is when there is plenty of oxygen to react with. 
a)
True
b)
False
133.

Combustion is classified as a/an:

a)

endothermic reaction

b)

exothermic reaction

c)

neutralisation reaction

d)

acid + metal reaction

134.

The general equation for a combustion reaction is:

a)

methane + oxygen --> carbon dioxide + water

b)

fuel --> carbon dioxide + oxygen

c)

fuel + oxygen --> carbon dioxide + water + ENERGY

d)

fuel + carbon dioxide --> oxygen + water

135.

propane + oxygen --> carbon + water + carbon monoxide

a)

complete combustion

b)

incomplete combustion

136.

methane + oxygen --> carbon dioxide + water

a)

complete combustion

b)

incomplete combustion

137.

If a flame is giving off smoke, this type of combustion is occurring...

a)

Complete combustion

b)

Incomplete combustion

138.
Which of the following describes the law of conservation of mass?
a)
In a reaction, atoms are created or destroyed.
b)
In a reaction, atoms are not lost or made.
c)
In a reaction, the mass of the product may be more or less than the reactants.
d)
In a reaction, mass never stays the same.
139.
For the equation:
2H2 +  O2 --> 2H2O
How much H2O will be produced if we react 4g of H2 and 32g of O2?
a)
4g
b)
32g
c)
36g
d)
28g
140.
What will happen to the mass of the product if I double the mass of the reactants?
a)
It will decrease by half.
b)
It will increase by half.
c)
It will double in amount.
d)
The mass remains the same.
141.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
142.
What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?
a)
They both will weigh the same
b)
The product always weighs more than the reactant
c)
The reactant will weigh more than the product
d)
They both will loose mass after the reaction
143.
Jason poured 500 grams of water into a container and tightly sealed it. The water was allowed to freeze. Which is most likely true about the ice that formed?
a)
The mass of the ice is the same as the mass of the water.
b)
The mass of the ice is greater than the mass of the water.
c)
The ice formed is a different substance than the water.
d)
The ice formed is the same temperature as the water.
144.

What are the products of photosynthesis?

a)

carbon dioxide and water

b)

glucose and oxygen

c)

sunlight and water

d)

glucose and carbon dioxide

145.

Which of these equations BEST shows the reactants and products of cellular respiration?

a)

carbon dioxide + water > sugar + oxygen

b)

water + oxygen > sugar + carbon dioxide

c)

sugar + oxygen > carbon dioxide + water

d)

sugar + carbon dioxide > oxygen + water

146.

Glucose and Oxygen are ___?

a)

the products of photosynthesis and the reactants of respiration

b)

the reactants of photosynthesis and the product of respiration

c)

involved in only respiration

d)

involved in only respiration

147.
What are the reactants of photosynthesis?
a)
Glucose + Oxygen
b)
Water + Carbon Dioxide
c)
Light Energy + Carbon Dioxide + Water
d)
Light Energy + Oxygen + Water 
148.
What are the products of photosynthesis?
a)
C6H12O6 + CO2
b)
C6H12O6 + O2
c)
Water + Light Energy + CO2
d)
Water + Light energy + O2
149.
What gas is needed for respiration?
a)
Carbon dioxide
b)
nitrogen
c)
Oxygen
d)
hydrogen
150.
What is one of the reactants of cellular respiration?
a)
energy
b)
glucose
c)
carbon dioxide
d)
water

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145 questions

Biology - Final Review S2

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Worksheet

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148 questions

Chemistry in Living Systems Review

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151 questions

Cells Unit Test Review

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9th - 12th Grade

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150 questions

Genetics #5

quiz

Worksheet

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9th Grade

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154 questions

2018 Final Exam Review Biology

quiz

Worksheet

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9th - 10th Grade