What has the lowest ionization erergy? Fluorine (F)
O Francium (Fr)
O Helium (He)
O lodine (1)

Francium (Fr)

Explanation:

From the given choices, francium will have the lowest ionization energy.

Ionization energy is the energy required to remove the most loosely held electron within an atom.

The magnitude of the ionization energy depends on the characteristics of the atom in relation to its nuclear charge, atomic radius, stability etc.

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