Sulfur atoms can form the negative ion

CHEMISTRY · Single correct · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties

Problem

S^{2-}

. Three other atoms or ions are listed. - argon, Ar - calcium, Ca - oxide,

O^{2-}

How many of these atoms or ions have the same electronic configuration as

S^{2-}

? (A) 0 (B) 1 (C) 2 (D) 3