Which statement best describes how electrons till orbitals in the penodic table? Electrons fill orbitals in order of their increasing energy from left to right
o Electrons fill orbitals in order of their increasing energy from right to left
Elements fill orbitals in order of increasing energy from top to bottom in each group
Elements fill orbitals in order of increasing energy from bottom to top in each group.

Electrons fill orbitals in order of increasing orbital energy

Explanation:

Apex

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.