which neutral atom is isoelectronic?

Question

which neutral atom is isoelectronic with each of the following ions:
a) N3-
b) Ba2+

Answer 1

N3- Ne

Ba2+ Xe

Answer 2

isoelectronic means having the name number of electrons. a neutral N atom has 7 electrons, so an N3- ion has 3 more electrons, which gives 10 electrons. a neutral Neon atom has 10 electrons and thus is isoelectronic with N3-

Ba has 56 electrons, so Ba2+ has 2 fewer, or 54 electrons
Xe has 54 and thus is isoelectronic with Ba2+

Answer 3

Two ions are isoelectronic with each other when they have two shared characteristics:

1. The same number of valence electrons
2. The same number and geometry of atoms in the ion

The N atom has 5 valence electrons, so the N(3-) ion must have 8 valence electrons to give it a -3 charge. Likewise, the Ba atom has 2 valence electrons, so the Ba(2+) ion is missing these two electrons. This means the lower shell of electrons is now the valence shell, so it has 8 valence electrons.

So, we need an atom with 8 valence electrons in its normal, unionized state. Both Neon and Argon fit this description.

Answer 4

isoelectronic species are particles(atoms, ions or molecules) possessing the same no of ELECTRONS.

now, N3- has a total of 10 electrons. so it is isoelectronic with Ne(neon).
Ba2+ has 54 electrons. so it is isoelectronic with Xe(xenon).