Question

Give the formulae of the Species that will be isoelectronic with the following atoms or ions:
(any two formulae for each atom/ions)

(a) Ne (b) Cl-
(c) Rb+ (d)H-

Answer 1

The formulae of the species that will be isoelectronic with the following atoms or ions are:

(a) Ne: F⁻ and Na⁺

- There are 10 electrons in Ne.

- F⁻ and Na⁺ also have 10 electrons.

(b) Cl⁻: Ar and K⁺

- There are 18 electrons in Cl⁻.

- Ar and K⁺ also have 18 electrons.

(c) Rb⁺: Kr and Sr²⁺

- There are 36 electrons in Ne.

- Kr and Sr²⁺ also have 36 electrons.

(d) H⁻: He and Li⁺

- There are 2 electrons in Ne.

- He and Li⁺ also have 2 electrons.