Question

what is the maximum number of electron present in an atom, in which highest principle quantum number is 4?

Answer 1

Dear Student,

If an atom has highest quantum number 4, then possibllr n value are 1,2,3,4
Now, maximum number of electrons in an energy level is given by 2n^​2
Therefore, for n=0, maximum no. of electrons =2(1)²=2
For n=1, maximum no. of electrons =2(2)²=8
For n=3, maximum no. of electrons =2(3)²=18
For n=4, maximum no. of electrons =2(4)²= 32
Therefore, total no. of electrons =2+8+18+32=60