WAEC - Chemistry (2019 - No. 4)
which of the following elements has the highest ionization energy?
Calcium
Chlorine
Flourine
Magnesium
Explication
The ionisation energy is the minimum energy required to remove the most loosely bound electron of an isolated gaseous atom, positive ion, or molecule.
Fluorine has the highest ionization energy when assessed through the trend on the periodic table.