The total number of isoelectronic species from the given set is ________.
$O^{2 -}, F^{-}, Al, {Mg}^{2 +}, {Na}^{+}, O^{+}, Mg, {Al}^{3 +}, F$

Question

The total number of isoelectronic species from the given set is ________. O 2 - , F – , Al , Mg 2 + , Na + , O + , Mg , Al 3 + , F

TestHub · Accepted Answer

Isoelectronic are those which have the same number of electrons. Let us write the number of electrons from the given species.
Species No. of electrons
$O^{- 2}$ $10$
$F^{-}$ $10$
$Al$ $13$
${Mg}^{2 +}$ $10$
${Na}^{+}$ $10$
$O^{+}$ $7$
$Mg$ $12$
${Al}^{3 +}$ $10$
$F$ $9$
Hence five species among the given are isoelectronic species.

Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub

Doubts & Discussion

Species	No. of electrons
$O^{- 2}$	$10$
$F^{-}$	$10$
$Al$	$13$
${Mg}^{2 +}$	$10$
${Na}^{+}$	$10$
$O^{+}$	$7$
$Mg$	$12$
${Al}^{3 +}$	$10$
$F$	$9$