Question

why does the first ionization energy increase from left to right in period of periodic table ​

Answer 1

Answer:

as we moves left to right in the periodic table then the atomic size of an atom started to reduce it means the atomic radius will continuously decrease .when we move left to right so the force of attraction between the electron and the nucleus will increase that's why ionization enthalpy (energy required to remove the outermost electron from the outermost cell) will also increase.

hope sufficient and helpful.