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A hydrogen-like atom has one electron re...

A hydrogen-like atom has one electron revolving around a stationary nucleus. The energy required to excite the electron from the second orbit to the third orbit is 47.2 eV. The atomic number of the atom is

A

2

B

3

C

4

D

5

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The correct Answer is:
D
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MODERN PUBLICATION-UNIT TEST PAPER - NO.8-EXERCISE
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