What is difference between octet rule and duplet rule?

Ans: Active atoms tend to complete the number of electrons according to octet rule or duplet rule. The key difference between octet and duplet is that octet is an atom or an ion having a maximum of eight electrons in the outermost shell while duplet is an atom having the maximum of two electrons in the outermost shell.

U whay do you need with?

Answer it is also known as the completion state is untrue of the activation complex;