Question

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.

Answer 1

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.