Of the following, which information is obtained by looking at the group numbers of elements? (Group A number designations: 1A-8A)
The number of electrons that could be gained or lost by an atom to satisfy the
octet rule.
The number of valence electrons in an atom.
The number of energy levels in an atom.
Both A and B.

well in order to answer this question you have to provide more information < 3

14,16 18 reacts with group

the answer is c i believe

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.