Question

Which statement best describes how electrons fill orbitals in the periodic table? Electrons fill orbitals in order of their increasing energy from left to right. 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.

Answer 1

The statement "electrons fill orbitals in order of their increasing energy from left to right." makes sense to me.

Answer 2

Electrons fill orbitals in order of increasing energy from left to right. As the group number increase also the number of valence electorns of each group will increases