How many shells are present in lanthanide

How many sub-shells are present in M-shell ?

How many sub-shells are present in a principal energy shell ?

How many sphincters are present in the urethra

How many electrons are present in the M shell, the outermost shell of argon?

How many electrons are presents in the outer shell of carbon?

How many electrons are present in the valence shell of P in PCl_3 ?

How many electrons are present in the valence shell of P in PCl_3 ?

Write the symbol of the outermost shell of magnesium (Z = 12) atom. How many electrons are present in the outermost shell of magnesium?

How many electrons are present in the valence shells of the central atoms in the molecules of BeCl_(2), BF_(3) and PCl_(5) ?