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Chemical properties of Halogens

Answer Text:
Chemical properties of Halogens.
Note: It is not easy for non-metals like halogens to form cations.
Reason: the ionization energy (amount of energy required to lose an electron(s) from the outermost energy level of a gaseous atom) is very large.
- Thus most non-metals react by forming anions
(negatively charged ions) by electron loss.
Ion formation.
- Halogens react by gaining a single electron into the outermost energy level to form a stable electron configuration and corresponding anions.
- During ion formation by electron loss energy is released, and the energy change for this process is called electron affinity
Note: Definition.