The combination of atoms to form molecules is based on octel rule. Giv

1.	The combination of atoms to form molecules is based on octel rule. Give two limiations of this rule.
Answer» (i) It cannot explain the formation of molecules like BeF₂ , BF₃ in which the central atom has less than 8 electrons in its valence shell. (ii) It cannot explain the formation of molecules such as PF₅ , SF₆ etc., in which central atom has more than eight electrons in its valence shell.

The combination of atoms to form molecules is based on octel rule. Give two limiations of this rule.

Answer»

(i) It cannot explain the formation of molecules like BeF₂ , BF₃ in which the central atom has less than 8 electrons in its valence shell.

(ii) It cannot explain the formation of molecules such as PF₅ , SF₆ etc., in which central atom has more than eight electrons in its valence shell.