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Electron Gain Enthalpy

Which of the ...

Question

Which of the following electronic configurations corresponds to elements with largest negative electron gain enthalpy?

1 s^{2}

2 s^{2}

2 p^{5}

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1 s^{2}

2 s^{2}

2 p^{6}

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1 s^{2}

2 s^{2}

2 p^{6}

3 s^{2}

3 p^{5}

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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 D $1 s^{2}$ $2 s^{2}$ $2 p^{6}$ $3 s^{2}$ $3 p^{5}$
Electron gain enthalpy is the amount of energy released when an electron is added to a isolated gaseous atom.
Halogens have greater electron gain enthalpy values. So, ${1 S}^{2} {2 S}^{2} {2 P}^{6} {3 S}^{2} {3 P}^{5}$ has greater value.

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Similar questions

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

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

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

{1 s}^{2} {2 s}^{2} {2 p}^{6} {3 s}^{2} {3 p}^{6} {4 s}^{1}

{(I E)}_{1}

{(I E)}_{4}

\begin{matrix} List-I & List - II P. & 1 s^{2} & 1. & Element shows highest negative oxidation state Q. & 1 s^{2} 2 s^{2} 2 p^{5} & 2. & Element shows highest first ionisation enthalpy R. & 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5} & 3. & Element shows highest electronegativity on Pauling scale S. & 1 s^{2} 2 s^{2} 2 p^{2} & 4. & Element shows maximum electron gain enthalpy (most exothermic) \end{matrix}

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{5} 4 s^{1}

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