1.

For which of the following species, the expression for the energy of electron in nth orbit (E_(n)=-(13.6Z^(2))/(n^(2))eVatom^(-1)) has the validity?

Answer»

`He^(2+)`
`LI^(2+)`
Deuterium
Tritium

Solution :`Li^(2+)` D and T are ONE ELECTRON SPECIES. `He^(2+)` has no electron.


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