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Which of the following atoms has the highest ionization energy? Choose one answer. a. P b. Cl c. Mg
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cl because the electrons are strongly held and it is small in size
You'll have to assume that its first ionisation energy.
because in the 11th ionisation energy, Mg is the highest
1s2 2s2 2p6, 3s2 or the noble gas abbreviation [Ne] 3s2 this is the electronic configuration of magnesium. It is very difficult to take the outermost electron at this stage. So Mg has the highest ionisation potential.
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