Question

At absolute zero temperature molecules can have rotational kinetic energy

Answer 1

Hola mate

Name any two hill stations in Himachal pradesh.Isoelectronic are the species having same number of electrons.

A positive charge means the shortage of an electron.

A negative charge means gain of electron.

Number of electrons in Na+ = 11-1 = 10

Number of electrons in K+ = 19-1 = 18

Number of electrons in Mg2+ = 12-2 = 10

Number of electrons in Ca2+ = 20-2 = 18

Number of electrons in S2- = 16+2 = 18

Number of electrons in Ar = 18

Hence, the following are isoelectronic species:

1) Na+ andMg2+ (10 electrons each)

2) K+, Ca2+, S2- and Ar (18 electrons each