Question 599: Atoms & Nuclei

Question

The energy of a hydrogen atom in the ground state is $$-$$ 13.6 eV.  The energy of a He+ ion in the first excited state will be

Accepted Answer

Energy of a H-like atom in it's n
th
state is
given by,
E
n
= $$ - {{13.6} \over {{n^2}}}{Z^2}$$
For, first excited state of He
+
, n = 2, Z = 2
$$ 	herefore $$ E
He
+
= $$ - {{13.6} \over {{2^2}}} 	imes {2^2}$$ = -13.6 eV

Answer

$$-$$ 13.6 eV

Answer

$$-$$ 27.2 eV

Answer

$$-$$ 54.4 eV

Answer

$$-$$ 6.8 eV

Atoms & Nuclei

The energy of a hydrogen atom in the ground state is $-$ 13.6 eV. The energy of a He+ ion in the first excited state will be

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