Question

what is meant by duplet configuration

Answer 1

This is the duplet (or duet) rule. Here are additional clarifications: The octet rule is a chemical rule of thumb that reflects observation that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.

Answer 2

HEY FOLK...

This is just like octet configuration, but in this case for outermost shell of the atom have only max 2 electrons.

Like in Hydrogen and Lithium, they can't have 8 electrons but have 2 electrons for being stable and complete duplet.

The difference is only of no. of electrons is two in duplet and it's 8 in octet.

thank you
HOPE IT HELPS..!