The spectrum of helium is similar to:

H

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M g

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{L i}^{+}

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{H e}^{+}

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Solution

The correct option is D ${L i}^{+}$
The spectrum of helium is similar to that of $L i^{+}$ because both contain two electrons.

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Similar questions

The spectrum of $H e^{+}$ is expected to be similar to that of:

L i^{2 +}

H e

H e^{+}

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