Question

The table shows the electronic structures of four elements. 

Element	Electronic Structure
P	2, 6
Q	2, 8, 1
R	2, 8, 7
S	2, 8, 8

1.  Identify which element(s) will form covalent bonds with carbon.
2. “Carbon reacts with an element in the above table to form several compounds.” Give suitable reason.

Answer 1

1. P and R
2. Carbon has a valency four or Tetravalency & Catenation.