Final answer:
The correct option is B). Two Na atoms are required to bond with one S atom to fulfill the octet rule for both, forming the ionic compound Na2S.
Step-by-step explanation:
The student has asked how many Na atoms are needed to bond with S to satisfy the octet rule for both atoms. Sodium (Na) tends to lose one electron to form a Na+ ion with a 1+ charge, achieving an octet in its new valence shell. Sulfur (S) tends to gain two electrons to form an S2- ion with a 2- charge, completing its octet.
Since each Na atom can provide one electron, and S needs two electrons to complete its octet, two Na atoms are required to bond with one S atom. This bonding results in the formation of Na2S, an ionic compound where two Na+ ions combine with one S2- ion to maintain charge neutrality.
Thus, the answer to the student's question is b) 2 Na atoms.