Question

0.2 mol of the transition metal (M) comhine with excess chlorine gas to form 30.3 g of MCl3. What is the electronic configuration of the ion of the metal (M) in this compound?

(Sc=45, Cr=52, Fe=55.8, Co=58.9, Cl=35.5)

A) [Ar], 3d3
B)[Ar], 3d5
C)[Ar], 3d6
D) [Ne], 3s2 3p6​ ​

Answer 1

Given metallic chloride formula =MCl3

• Means M has valency 3

It belongs to Nitrogen(N) family.

• The elements given by Nitrogen,Phosphorus,Arsenic,Stubnum(Tin),Bismuth.

But the condition is that its transition element.

• The element is vanedium(V)

EC given by

`\\ \sf\longmapsto 1s^22s^22p^63s^23p^64s^23d^3`

`\\ \sf\longmapsto [Ar]3d^3`