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Ionization Enthalpy

Which of the ...

Question

Which of the following electronic configuration of an atom has the lowest ionization enthalpy?

1 s^{2} 2 s^{2} 2 p^{6}

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1 s^{2} 2 s^{2} 2 p^{5}

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1 s^{2} 2 s^{2} 2 p^{3}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}

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Solution

The correct option is C $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$
The alkali metals have a very high tendency to lose electron as their uni positive cation has the inert gas configuration.

Thus, their IE value is very low. Among given options, $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$ is a alkali metal. Hence answer is option D.

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Similar questions

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}

1 s^{2} 2 s^{2} 2 p^{5}

1 s^{2} 2 s^{2} 2 p^{6}

1 s^{2} 2 s^{2} 2 p^{3}

With which of the following configuration an atom has the lowest ionization enthalpy?

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5}

1 s^{2} 2 s^{2} 2 p^{3}

1 s^{2} 2 s^{2} 2 p^{5}

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}

1 s^{2} 2 s^{1}

1 s^{1} 2 s^{2} 2 p^{3}

1 s^{2} 2 s^{2} 2 p^{5}

1 s^{2} 2 s^{2} 2 p^{6} {3 s}^{1}

A, B, C

D

1 s^{2} 2 s^{2} 2 p^{6}

1 s^{2} 2 s^{2} 2 p^{4}

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}

1 s^{2} 2 s^{2} 2 p^{5}

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