Question

CHEMISTRY - TOPIC: Electronic Configuration

An element has the following electronic configuration: [Kr]4d¹⁰5s²5p⁴ Answer the following:

(i) What period does it belong to?

(ii) What is its group number? (Use group numbers from 1 to 18)

(iii) What kind of element is it? (Main group metal, transition metal, metalloid, nonmetal?)

(iv) How many unpaired electrons are there in an atom of this element?

Answer 1

i)
It is filling 5th shell and p shell is still unfilled for n=5
So, it belongs to period 5

ii)
It has unfilled p shell.
So, it belongs to p block.
Since there are 4 unpaired electron in it, the element must be in group 16, that is oxygen family
Answer: 16

iii)
It is main group element as it is in p block

iv)
in p shell, it has 4 electron
So, 2 will be paired and 2 are unpaired
Answer: 2