What is the maximum number of electrons which can be accommodated in an atom in which the highest principal quantum number is 4 ?

What is the maximum number of electrons which can be accommodated in a

1.	What is the maximum number of electrons which can be accommodated in an atom in which the highest principal quantum number is 4 ?
Answer» 10 18 36 54 Solution :Maximum n = 4 means we can fill upto `4p^(6)` because after that 5s starts. HENCE, complete E.C. `= [Ar]^(18) 4S^(2) 3D^(10) 4p^(6)`. Total `e^(-) = 36`