Question

define electron gain enthalpy how does it vary along the group and along the period​

Answer 1

Answer:

Electron gain enthalpy becomes more negative along the period. ... Electron gain enthalpy becomes less negative down the group. Reason: This is because size of the atom increases and the added electron will be farther from the nucleus.

Answer 2

Answer:

The enthalpy change accompanying the addition of an electron to a neutral gaseous atom is called electron gain enthalpy.  Electron gain enthalpy becomes more negative along the period. Reason: This is because the effective nuclear charge increases from left to right and it will be easier to add an electron to a smaller atom. Electron gain enthalpy becomes less negative down the group. Reason: This is because size of the atom increases and the added electron will be farther from the nucleus.

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