Question

What is a periodic property? How do the following properties vary in a group and in a

period? (a) Atomic radius (b) Electron gain enthalpy​

Answer 1

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Reason: As we go from left to right in a period, the atomic radius gradually decreases. As a result of which, the attraction between the added electron and the nucleus increases. Hence, electron affinity increases in a period. In a group as we go from top to bottom the electron affinity values gradually decrease.....

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Answer 2

Answer:

As we go from left to right in a period, the atomic radius gradually decreases. As a result of which, the attraction between the added electron and the nucleus increases. Hence, electron affinity increases in a period. In a group as we go from top to bottom the electron affinity values gradually decrease.

hope it helps you...........❤️