Quiz about Year 9 Chemistry Quiz Revision

Question 1

What is the pH of a neutral solution?

Accepted Answer

7

Answer

0

Answer

14

Answer

1

Question 2

What is the atomic number of carbon?

Accepted Answer

6

Answer

12

Answer

14

Answer

8

Question 3

Which of the following elements has the electron configuration 2, 8, 6?

Accepted Answer

Sulfur

Answer

Oxygen

Answer

Chlorine

Answer

Argon

Question 4

How many valence electrons does nitrogen have?

Accepted Answer

5

Answer

3

Answer

7

Answer

8

Question 5

What is the charge of an electron?

Accepted Answer

-1

Answer

+1

Answer

0

Answer

+2

Question 6

Which of the following is an isotope of carbon?

Accepted Answer

All of the above

Answer

$$^{12}C$$

Answer

$$^{13}C$$

Answer

$$^{14}C$$

Question 7

What is the maximum number of electrons that can occupy the second electron shell?

Accepted Answer

8

Answer

2

Answer

4

Answer

10

Question 8

Which of the following is the correct balanced equation for the reaction between hydrogen and oxygen to form water?

Accepted Answer

$$2H_2 + O_2 \rightarrow 2H_2O$$

Answer

$$H_2 + O_2 \rightarrow H_2O$$

Answer

$$H_2 + 2O_2 \rightarrow 2H_2O$$

Answer

$$2H_2 + 2O_2 \rightarrow 2H_2O$$

Question 9

What is the atomic mass of an element with 20 protons, 20 neutrons, and 20 electrons?

Accepted Answer

40

Answer

20

Answer

60

Answer

80

Question 10

Which of the following elements has a full outer electron shell?

Accepted Answer

Helium

Answer

Lithium

Answer

Oxygen

Answer

Nitrogen

Question 11

What is the electron configuration of neon?

Accepted Answer

2, 8

Answer

2, 7

Answer

2, 6

Answer

2, 5

Question 12

Which of the following is a property of acids?

Accepted Answer

Sour taste

Answer

Bitter taste

Answer

Slippery feel

Answer

Turns red litmus paper blue

Question 13

What is the charge of a sodium ion?

Accepted Answer

+1

Answer

-1

Answer

+2

Answer

-2

Question 14

Which of the following is a characteristic of isotopes?

Accepted Answer

Same number of protons, different number of neutrons

Answer

Same number of neutrons, different number of protons

Answer

Same number of electrons, different number of protons

Answer

Different number of electrons, same number of protons

Question 15

What is the main product of a complete combustion reaction involving a hydrocarbon?

Accepted Answer

Carbon dioxide

Answer

Carbon monoxide

Answer

Water

Answer

Methane

Question 16

Which of the following elements has 3 valence electrons?

Accepted Answer

Boron

Answer

Carbon

Answer

Nitrogen

Answer

Oxygen

Question 17

What is the electron configuration of sodium?

Accepted Answer

2, 8, 1

Answer

2, 8, 2

Answer

2, 7, 1

Answer

2, 8, 8

Question 18

Which of the following is a diatomic molecule?

Accepted Answer

Oxygen

Answer

Helium

Answer

Neon

Answer

Argon

Question 19

What is the chemical formula for table salt?

Accepted Answer

NaCl

Answer

KCl

Answer

NaOH

Answer

HCl

Question 20

Which of the following elements is a noble gas (in group 8)?

Accepted Answer

Helium

Answer

Hydrogen

Answer

Nitrogen

Answer

Oxygen

Question 21

What is the main component of natural gas?

Accepted Answer

Methane

Answer

Ethane

Answer

Propane

Answer

Butane

Question 22

Which of the following is in group 7?

Accepted Answer

Fluorine

Answer

Oxygen

Answer

Nitrogen

Answer

Carbon

Question 23

What is the chemical symbol for gold?

Accepted Answer

Au

Answer

Ag

Answer

Pb

Answer

Fe

Question 24

Which of the following is a property of bases?

Accepted Answer

Slippery feel

Answer

Sour taste

Answer

Turns blue litmus paper red

Answer

Reacts with metals to produce hydrogen gas

Question 25

What is the pH of a solution with a high concentration of hydroxide ions (OH-)?

Accepted Answer

14

Answer

7

Answer

1

Answer

10

Question 26

2, 8, 8, 1 is the electron configuration of which element?

Accepted Answer

Potassium

Answer

Calcium

Answer

Neon

Answer

Chlorine

Question 27

Fluorine is likely to form which type of ion?

Accepted Answer

1-

Answer

1+

Answer

2-

Answer

2+

Question 28

Calcium is likely to form which type of ion?

Accepted Answer

2+

Answer

3+

Answer

3-

Answer

2-

Question 29

The group number of an element tells us ______?

Accepted Answer

The number of valence electrons

Answer

The number of protons

Answer

The number of electrons

Answer

The number of shells

Question 30

The period of an element tell us _____ ?

Accepted Answer

The number of electron shells

Answer

The number of electrons

Answer

The atomic number

Answer

The number of valence electrons

Question 31

An element in group 2, period 4 has _____

Accepted Answer

2 valence electrons + 4 electron shells

Answer

4 valence electrons + 2 electron shells

Answer

2 electrons in the first shell + 4 in valence shell

Answer

4 electrons in the first shell + 2 in the valence shell

Question 32

A sample of a radioactive substance has a half-life of 10 hours. If the initial mass of the substance is 80 grams, how much will remain after 30 hours?

Accepted Answer

5g

Answer

40g

Answer

20g

Answer

10g

Question 33

The half-life of a radioactive isotope is 8 days. If a sample starts with 200 grams, how much will remain after 24 days?

Accepted Answer

25g

Answer

100g

Answer

50g

Answer

12.5g

Question 34

During an endothermic reaction, energy is:

Accepted Answer

Absorbed from the surroundings, making them cooler

Answer

Released into the surroundings as heat

Answer

Not involved in the reaction

Answer

Converted entirely into matter

Question 35

What happens to heat energy in an exothermic reaction?

Accepted Answer

It is released into the surroundings.

Answer

It is absorbed from the surroundings.

Answer

There is no heat energy involved.

Answer

It remains stored in the reactants.

Question 36

An atom becomes _________ when it gains electrons.

Accepted Answer

Negative

Answer

Positive

Answer

Neutral

Answer

Stable

Question 37

What is the common charge of an ion formed by nitrogen (N)?

Accepted Answer

3-

Answer

3+

Answer

2-

Answer

2+

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