All four species O , F , Na

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

Problem

All four species O

^{2-}

, F

^{-}

, Na

^{+}

, and Mg

^{2+}

are isoelectronic (each has 10 electrons). Which of the following lists these species in order of increasing ionic radius? (a) Na

^{+}

< Mg

^{2+}

< F

^{-}

< O

^{2-}

(b) F

^{-}

< O

^{2-}

< Na

^{+}

< Mg

^{2+}

^{2+}

< Na

^{+}

< F

^{-}

< O

^{2-}

(d) O

^{2-}

< F

^{-}

< Na

^{+}

< Mg

^{2+}