Ionisation energy of He^(+) is 19.6 xx 10^(-18)"J atom"^(-1) The energy of the first stationary state of Li^(2+) is

Ionisation energy of He^(+) is 19.6 xx 10^(-18)"J atom"^(-1) The energ

1.	Ionisation energy of He^(+) is 19.6 xx 10^(-18)"J atom"^(-1) The energy of the first stationary state of Li^(2+) is
Answer» `-4.41 xx 10^(-18) J ."atom"^(-1)` `-4.41 xx 10^(-17) J ."atom"^(-1)` `-4.41 xx 10^(-16) J ."atom"^(-1)` `8.72 xx 10^(-18)J ."atom"^(-1)` SOLUTION :`(E_1)/(E_2) = (Z_1^2)/(Z_2^2) xx (n_2^2)/(n_1^2)`