Welcome to the Quiz!

This quiz contains 9 questions from a mix of 1 subtopics.

What is the definition of relative atomic mass?

The number of neutrons an element has

The number of protons an element has

The average mass of all the isotopes of that element

0

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1

What is the symbol for relative atomic mass?

Ar

A

Mr

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1

What is the relative atomic mass of carbon (C)?

(You may need a periodic table)

12

0

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1

What is the relative atomic mass of potassium (K)?

(You may need a periodic table)

39

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1

What is the symbol for relative formula mass?

A

Mr

Ar

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1

What is the relative formula mass of ammonia (NH3)?

(You may need a periodic table)

17

0

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1

What is the relative formula mass of calcium carbonate (CaCO3)?

(You may need a periodic table)

100

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1

What is the percentage mass of carbon (C) in methane (CH4)?

(Ar of carbon = 12, Ar of hydrogen = 1)

75

%

%

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1

What is the percentage mass of oxygen (O) in calcium carbonate (CaCO3)?

(You may need a periodic table)

48

%

%

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1