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Iodine is a black, crystalline, shiny solid and belongs to Group VII. Sodium is a soft, shiny solid and belongs to Group I.
a) Classify iodine and sodium as metal or non-metal.

b) List one reason for your classification in each case.

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Answer:

a.

Iodine: non-metal

Sodium: metal

b.

Idoine is a part of the halogens, which is a non-metal group.

Sodium is in group one and is a part of the alkali metals.

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