Only Q4a, pls help i cant process this question

Explanation:

The group 2 ions are in the second column in the periodic table, for example Be, Mg and Ca

The group 3 ions are in the third column in the periodic table, for example B, Al and Ga

It's the same thing for the rest of the groups

Ions either lose or gain electrons to have a full outer shell, just like the noble gases

metal atoms lose electrons from their outer shell to form positively charged ions

From groups 1 to 3 the charge is the same as the group number

Non metals gain electrons on their outer shell to form negatively charged ions

From groups 5 to 7 the charge is 8 subtract the group number

Example: what is the charge for group 6 ions?

8 - 6 = 2, and the charge is negative so 2-

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.