Question

Which of the following is not a chalcogen :
(a) Se
(b) O
(c) S
(d) Na

Answer 1

I THINK D IS CORRECT

Answer 2

Group 16 elements are called Chalcogens.

• oxygen

• sulphur

• selenium

• tellurium

• polonium

Since Na is a s-block element and it is under the group Alkali metal(1 grp).

Option D is not a Chalcogen

HOPE YOU UNDERSTAND