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A single electron orbits around a stationary nucleus of charge +Ze. It requires 47.2 eV to excite the electron from the `2^"nd"` to `3^"rd"` Bohr orbit. Find atomic number 'Z' of atom .

A

Atomic number of species is 5

B

The kinetic energy in first excited state is 85 eV

C

The potential energy in second state is -170 eV

D

First excitation potential of species is 255 V

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