Question

Which species is isoelectronic with neon (Ne)? Select all that apply.

A) F-
B) Na+
C) O2-
D) Mg2+

Answer 1

The species that are isoelectronic with Neon (Ne) are: Na+ and Mg2+.

Step-by-step explanation:

Neon (Ne) is isoelectronic with species B) Na+ and D) Mg2+.

The concept of isoelectronic species is that they have the same number of electrons. Since Neon has 10 electrons, then any species with 10 electrons is isoelectronic with Neon. Sodium ion (Na+) has 10 electrons (2s²2p⁶) and Magnesium ion (Mg²+) also has 10 electrons (2s²2p⁶).

The other options, A) F- and C) O2-, do not have 10 electrons, therefore, they are not isoelectronic with Neon.