Question

how electron gain enthalpy vary along the period and down the group ?

Answer 1

Variation in electron gain enthalpy in the period: In the modern periodic table, on moving from left to right across aperiod, the atomic size of elements decreases and the effective nuclear charge increases. ... Variation ofelectron gain enthalpy in a group: Generally, when we move down in agroup becomes less negative.

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Answer 2

Variation in electron gain enthalpy in the period: In the modern periodic table, on moving from left to rightacross a period, the atomic size of elements decreases and the effective nuclear charge increases. ... Variation of electron gain enthalpy in a group: Generally, when we move down in a group becomes less negative.

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