Which one of the following is an alkaline earth element? a) carbon b)sodium c)zinc d)iron

Answer 1

Alkaline Earth metals belong to group II in the periodic table.
Actually there's nothing in the choices that belongs to group II. Carbon belongs to group IV, Sodium belongs to group I, while Zinc and Iron are found in transition metal group.

Answer 2

Hmmm. Maybe the question meant to ask about alkalis. Sodium is an alkali metal.

Answer 3

Zinc

Answer 4

Clearly my solution