Question

What change is observed across a period and down the group in the following:
i) Electron affinity
ii) Ionization.
What is the unit of each ?​

Answer 1

Explanation:

In chemistry and atomic physics, the electron affinity (Eₑₐ) of an atom or molecule is defined as the amount of energy released or spent when an electron is added to a neutral atom or molecule in the gaseous state to form a negative ion

Answer 2

Explanation:

electron affinity decreases down the group and increases from left to right in period

ionization energy decreases down the group

and increases from left to right