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Part 1 –Atomic Structure and the Periodic Table

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Part 3 - Groups 1, 7 and 0

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Part 2 – Elements, Compounds, Formulae and Balancing Equations

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Question 1

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Question 1

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Question 2

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Question 2

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Question 3

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Question 3

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Question 4

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Question 4

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Question 4

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Question 4

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Question 5

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Question 5

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Part 4 – Calculations in Year 10 Chemistry

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Question 1

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Question 1

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Question 2

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Question 2

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Question 3

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Question 3

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Question 4

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Question 4

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Question 5

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Question 5

Element

N

O

Mass

30.4

69.6

Ar

14

16

Mass/Ar

2.17

4.35

/by smallest number

1

​

​

N

2

​

​

O2

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Question 5

Mr of NO2 = 46

​

Mr of an oxide of nitrogen = 92

​

92/46 = 2

​

2(NO2) = N2O4

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Question 6

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Question 6

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Thank you��Diolch yn fawr