Question

which statement best describes how electrons fill orbitals in the periodic table? o 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. o elements fill orbitals in order of increasing energy from top to bottom in each group. o elements fill orbitals in order of increasing energy from bottom to top in each group.

Explanation:

According to the Aufbau principle, electrons fill orbitals in order of increasing energy. In the periodic - table, this corresponds to filling from left - to - right across periods as the energy of orbitals increases in that direction.

Answer:

Electrons fill orbitals in order of their increasing energy from left to right.