Question

Two elements belonging to the same group form a covalent compound. Identify the probable atomic numbers of the elements.

• A. 16,8
• B. 20,1
• C. 16,9
• D. 20,9

Answer 1

The correct option is A

16,8

Explanation for correct option:

(A) 16,8

• Sulphur ($\mathrm{S}$) has atomic number $16$ and Oxygen ($\mathrm{O}$) has atomic number $8$.
• So, both belong to the same group i.e., group $16$.
• Thus these two elements can form covalent compounds.
• Example - Sulphur dioxide (${\mathrm{SO}}_2$)

Explanation for incorrect options:

(B) Elements having atomic number $20$ and atomic number $1$ does not belong to the same group.

(C) Elements having atomic number $16$ and atomic number $9$ does not belong to the same group.

(D) Elements having atomic number $20$ and atomic number $9$ does not belong to the same group.

Hence, the correct option is (A).