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Card 16

Front

Oxygen/oxide (O)

Back

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Card 17

Front

Sulphur/sulphide (S)

Back

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Card 18

Front

Carbonate ion (CO3 2-)

Back

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Card 19

Front

Sulphate ion (SO4 2-)

Back

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Card 20

Front

Sulphite ion (SO3 2-)

Back

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Card 21

Front

Dichromate (VI) ion (Cr2O7 2-)

Back

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Card 22

Front

Aluminium (Al)

Back

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Card 23

Front

Boron (B)

Back

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Card 24

Front

Chromium (III) (Cr3+)

Back

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Card 25

Front

Iron (III) (Fe3+)

Back

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