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Question: The energy of an atom (or ion) in its ground state is – 54.4 eV. It may be –...

The energy of an atom (or ion) in its ground state is – 54.4 eV. It may be –

A

Hydrogen

B

Deuterium

C

He+

D

Li++

Answer

He+

Explanation

Solution

–13.6 z2 = – 54.4 Ž Z = 2

\ He+ is answer