helium has highest i.e
is because of the shielding effect that the ionization energy decreases from top to bottom within a group. From this trend, Cesium is said to have the lowest ionization energy and Fluorine is said to have the highest ionization energy (with the exception of Helium and Neon
HELIUM have high ionisation energy and low electron affinity
Helium i.e. 2372.3 kJ/mole or 24.5874 eV.
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Helium has highest ionisation potential 2372.1kg/mol
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Helium has the high ionisation energy
Mercury has low electron affinity.
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Cation is the element having highest ionisation energy
Cation :- Elements having +ve charge ions are/c cations & -ve charge ions are/c antions
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