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

1.	The combination of atoms to form molecules is based on octet rule. Give two limitations 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 PF₂,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 octet rule. Give two limitations 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 PF₂,SF₆ etc. in which central atom has more than eight electrons in its valence shell.