Which is the configuration of an atom in the ground state? A)
2-8-2
B)
2-6-1
C)
2-7-2
D)
2-7-3

A

Explanation:

The answer would be A because  if u subtract 2-8 u get -6  plus if u add  another two to the answer the whole answer would be two

it can be icreased by increasing pressure.

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.