Question

The halogen with the highest first ionization energy is ___________

Answer 1

• The energy required for an electron in an atom to come out of the nucleus is called ionization energy.
• In a group, energy levels decreases while going downwards. (top to bottom)
• There are seven halogens in the periodic table.
• Among them, Fluorine is the first halogen on the table.
• Hence, Fluorine has the highest first ionization energy.