find kinetic energy, electrostatic potential energy and total
. energy of single electron in 2nd excited state of `Li^(+2)` atom.

Options

A. `E =-13.6 eV` `K.E =13.6 eV` `P.E =27.2 eV`
B. `E =13.6 eV` `K.E =13.6 eV` `P.E =27.2 eV`
C. `E =-13.6 eV` `K.E =13.6 eV` `P.E =-27.2 eV`
D. `E =13.6 eV` `K.E =13.6 eV` `P.E =-27.2 eV`

Answer

C

Explanation

`:. E_I^H =0 13.6eV`
Further `E prop (Z)^2)/(n^2), For `Li^2,`, Z =3`
and for 2 end excited stat4e n =3
`E = -13.6 ((33)/(3))^2 =-13.6V`
`K = |/E| = 13.6eV`
U= 2E =-27.2eV`