What is true below for an atom that is in its ground state

Last updated: 8/7/2022

What is true below for an atom that is in its ground state electron configuration. Unpaired electrons in the same orbitals have opposite spins. Orbitals within a subshell are filled to maximize the pairing of electrons. Electrons are promoted to a higher-energy orbital before they are paired in the same orbital. Electrons fill higher-energy shells before filling lower-energy shells. Unpaired electrons in different orbitals have opposite spins.