Question

Arrange the following atoms in ascending order of no. of H-atoms required by them to complete their octet.

• A. Fluorine
• B. Oxygen
• C. Nitrogen
• D. Carbon

Answer 1

Hydrogen shares 1 electron and attains duplet.
The given elements tend to attain octet.
$$\begin{array}{cccc}\text{Element}& \text{No. of valence electron}& \text{Electrons needed to attain octet}& \text{No. of combining H-atoms}\\ F& 7& 1& 1\\ O& 6& 2& 2\\ N& 5& 3& 3\\ C& 4& 4& 4\end{array}$$