Discuss the formation of KCl and CCl4molecules on the basis of electronic theory of valency. Give any two characteristics of ionic and covalent bond.
Ans:The Electronic theory of valency states that atoms of elements(which are not noble gases) tend to acquire the nearest noble gas configuration by either transfer or sharing of electrons.KCl is an ionic molecule formed as:19K= 2,8,8,1 17Cl = 2,8,7
Potassium donates the extra valence electron and attains stable configuration of Argon, and Positive charge. Chlorine accepts the electron and also attains the stable configuration of Argon and a negative charge.
Formation of CCl4
6C=2,4 17Cl = 2,8,7...