Question

Arrange the elements in ascending order of the number of electrons required to complete their octet.

• A. Phosphorous
• B. Sulphur
• C. Carbon
• D. Fluorine

Answer 1

Each of these atoms need to have 8 electrons in their valance shell to complete the octet.
$$\begin{array}{ccc}\text{Element}& \text{No. of valence electron}& \text{Electrons needed to attain octet}\\ F& 7& 1\\ P& 5& 3\\ C& 4& 4\\ S& 6& 2\end{array}$$