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For a doubly ionised Li-atom...

For a doubly ionised Li-atom

A

Angular momentum of an electron in 3rd orbit is `"3h"/(2pi)`

B

Energy of electron in 2nd excited state is -13.6 eV

C

Speed of electron in 3rd orbit is `c/137`, where c is speed of light

D

Kinetic energy of electron is 2nd excited state is half of the magnitude of the potential energy

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A, B, C, D
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