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Card 6

Front

Graphite is used in pencils. Explain why.

Back

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Card 7

Front

Give two advantages of gas chromatography compared with paper chromatography.

Back

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Card 8

Front

Fill in the missing word(s): Oxygen atoms with different numbers of neutrons are called ________.

Back

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Card 9

Front

Fill in the missing word(s): The bonds in a water molecule are formed by _______ electrons.

Back

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Card 10

Front

What is the ionic equation for the neutralisation reaction?

Back

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Card 11

Front

The formula of sodium chloride is NaCl. Calculate the relative formula mass of sodium chloride. Relative atomic masses: Na = 23; Cl = 35.5

Back

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