Question

Which halogen elements has the highest first ionisation energy?

Answer 1

Answer:

heya mate there's your answer

The minimum energy required to remove an electron from outermost orbital of an isolated gaseous atom is called ionization energy.

Fluorine has the highest first ionization energy among halogens.

hope it helps you

Thank you

Answer 2

Answer:

Fluorine.

Explanation:

Ionization energy is the energy required to remove a valence electron from an atom or an ion in its gaseous state, resulting in a positive charge.

  Fluorine has 7 electrons in the valence shell. These electrons are closer to the nucleus and hence, more energy is required to overcome the force of attraction so as to remove the electrons.