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

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Correct answer: 0

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.

The total number of isoelectronic species from the given set is...

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More from Structure of Atom

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