Question

1.)Construct an MO diagram for the He+2 ion.

a.Determine if the He+2 ion is stable or unstable?

b.What is its bond order?

2.) select the correct electron configurations from the list below. You can refer to the periodic table for atomic numbers.

The electron configuration of Cu+ is [Ar]4s13d9.
	The electron configuration of S2− is [Ne]3s23p6.
	The electron configuration of Fe is [Ar]4s23d6.
	The electron configuration of Si is [Ne]3s23p2.
	The electron configuration of Rb is [Kr]5s04d1.

Answer 1

a) It is stable than He2 however unstable than He

b) Bond order = BMO electron - ABM electron = 2-1 / 2 = 0.5

2) Electronic configuration will be

a) copper :[Ar] 4s1 3d10

Cu+ : [Ar] 3d10    [So incorrect statment as given]

b) Sulphur: [Ne] 3s² 3p⁴

S-2 : [Ne] 3s² 3p6 [So correct statement as given]

c) Iron

[Ar] 3d6 4s2 [So correct statement as given]

d) Silicon

[Ne] 3s2 3p2 [So correct statement as given]

e) Rb

Kr 5s1 , so the given configuration is incorrect