If radius of second shell of `Li^(+2)` ion is `R` `A`, then the radius of its third shell will be `:-`

If radius of second shell of Li^(+2) ion is R , then the radius of its third shell will be :-

Radius of 2 nd shell of He^(+) is ( where a_(0) is Bohr radius )

Radius of 2 nd shell of He^(+) is ( where a_(0) is Bohr radius )

The radius of hydrogen shell is 0.53Å, then in first excited state radius of shell will be :

Number of times radius of the 3rd shell of the H-atom as compared to that of radius of first shell is

A force F acts at the centre of a thin spherical shell of mass m and radius R. Find the acceleration of the shell if the surface is smooth.