why carbon has vaency 4 and chrine 1

Asked by trishlaparihar20th | 27th Mar, 2015, 07:46: PM

Expert Answer:

Valency is the combining capacity of an atom.
The atomic number of carbon is 6. Its electronic configuration is (2, 4). It has 4 electrons in its outermost shell (valence shell). Carbon will either gain or lose these 4 electrons to complete its octet. Thus, the valency of carbon is 4.
Similarly, atomic number of chlorine is 17. Its electronic configuration is (2, 8, 7). Thus, chlorine will gain 1 electron to complete its octet. Therefore, the valency of chlorine is 1.

Answered by Hanisha Vyas | 28th Mar, 2015, 02:45: PM