(B) The given process $X_{(g)} + e^- \to X^-_{(g)}$ represents the electron gain enthalpy of an atom $X$.When an electron is added to a neutral gaseou

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(B) The given process $X_{(g)} + e^- \to X^-_{(g)}$ represents the electron gain enthalpy of an atom $X$.When an electron is added to a neutral gaseous atom to form a gaseous anion,energy is generally released,making the process exothermic.For an exothermic process,the change in enthalpy $\Delta H$ is negative,i.e.,$\Delta H < 0$.

Class 11 Chemistry Classification of Elements and Periodicity in Properties Electron affinity

Medium

What will be the value of $\Delta H$ for the following process?
$X_{(g)} + e^- \to X^-_{(g)}$

A
$> 0$
B
$< 0$
C
$\ge 0$
D
$\le 0$

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Classification of Elements and Periodicity in Properties

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Electron affinity

When an electron is added to elements of group $16$ and $17$ in $n = 2$ and $n = 3$ shells,which case experiences less electron-electron repulsion and why?

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The correct order of the electron gain enthalpy of the given elements is

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The amount of energy released on the addition of an electron in the outermost shell of an atom is called:

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What is the correct order of electron affinity for the elements of the oxygen group in the periodic table?

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In which of the following processes is energy liberated?

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What will be the value of $\Delta H$ for the following process?$X_{(g)} + e^- \to X^-_{(g)}$

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When an electron is added to elements of group $16$ and $17$ in $n = 2$ and $n = 3$ shells,which case experiences less electron-electron repulsion and why?

The correct order of the electron gain enthalpy of the given elements is

The amount of energy released on the addition of an electron in the outermost shell of an atom is called:

What is the correct order of electron affinity for the elements of the oxygen group in the periodic table?

In which of the following processes is energy liberated?

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What will be the value of $\Delta H$ for the following process?
$X_{(g)} + e^- \to X^-_{(g)}$