Which one of the following sets of ions represents the collection of isoelectronic species?

K^{+}, C a^{2 +}, S c^{3 +}, {C l}^{-}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

N^{+}, C a^{2 +}, S c^{3 +}, F^{-}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

K^{+}, {C l}^{-}, M g^{2 +}, S c^{3 +}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

N a^{+}, M g^{2 +}, {A l}^{3 +}, {C l}^{-}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $K^{+}, C a^{2 +}, S c^{3 +}, {C l}^{-}$
The set of species in option A represents isoelectronic species.
species
Atomic
number
Z
electron gained or
lost in the ion formation
Total number
of electrons
in the ion
$K^{+}$ $19$ $- 1$ $18$
$C a^{2 +}$ $20$ $- 2$ $18$
$S c^{3 +}$ $21$ $- 3$ $18$
$C l^{- 1}$ $17$ $+ 1$ $18$
In this sets all species have $18$ electrons, thus they are isoelectronic.

Suggest Corrections

Similar questions

Which of the following sets contain only isoelectronic ions?
(i) $Z n^{2 +}, C a^{2 +}, G a^{3 +}, A l^{3 +}$

(ii) $K^{+}, C a^{2 +}, S c^{3 +}, C l^{-}$

(iii) $P^{3 -}, S^{2 -}, C l^{-}, K^{+}$

(iv) $T i^{4 +}, A r, C r^{3 +}, v^{5 +}$

S^{2 -}, N a^{+}, C a^{2 +}, C l^{-}

C a^{2 +}

M g^{2 +}

S c^{3 +}

K^{+}

O^{2 -}

C l^{-}

P^{3 -}

\begin{matrix} C l^{-}, A r, K^{+}, O^{2 -}, M g^{2 +}, F^{-} \end{matrix}

C a^{2 +}

Join BYJU'S Learning Program

species	Atomic number Z	electron gained or lost in the ion formation	Total number of electrons in the ion
$K^{+}$	$19$	$- 1$	$18$
$C a^{2 +}$	$20$	$- 2$	$18$
$S c^{3 +}$	$21$	$- 3$	$18$
$C l^{- 1}$	$17$	$+ 1$	$18$