Why does the s orbital fill before the p orbitals? A. The sorbital is lower in energy than the p orbital.
B. The s orbital belongs to a different energy level than the p orbital.
C. The s orbital is higher in energy than the p orbital.
D. The s orbital holds fewer electrons than a porbital.

What changes occur in the reaction indicated by the equation? check all that apply. the hydrogen nucleus loses protons. the oxygen nucleus gains protons. the bond in h2 is broken, and new bonds are formed between hydrogen and oxygen atoms. each electron associated with a hydrogen atom is shared with an oxygen atom.