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.

Explanation:

Electron filling follows the Aufbau principle, which dictates that electrons occupy the lowest-energy orbitals first. On the periodic table, as you move left to right across a period, electrons are added to orbitals in order of increasing energy, which matches the first option. The other options incorrectly describe the direction or scope of electron orbital filling.

Answer:

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