Question

30.Mg2+ is isoelectronic with (1 Point) Ca2+ Na+ Zn2+ Cu2+ 31.Which one of the following sets of ions represents a collection of isoelectronic species? (1 Point) K+, Cl–, Ca2+, Sc3+ Ba2+, Sr2+, K+, S2- N3–, O2–, F–, S2– Li+, Na+, Mg2+, Ca2+ 32.Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively: (1 Point) 12 and 4 12 and 5 16 and 4 16 and 5

Answer 1

Answer:

series of atom, ions and molecules in which each species contains the same number of electrons but different nuclear charge.

- wherein

e.g.\:\:N^{3-},O^{2-},F^{-},Ne,Na^{+},Mg^{2+},Al^{3+}

Let's state the number of electrons in each ion:

K+ : 18 Ba2+ : 54 N3- : 10 Li+ : 2

Cl- : 18 Sr2+ : 36 O2 : 10 Na+ : 10

Ca2+ : 18 K+ : 18 F- : 10 Mg2+ : 10

Sc3+ : 18 S2- : 18 S2- : 18 Ca2+ : 18