Question

Which has a higher ionization energy magnesium or aluminum?

Answer 1

Aluminium has one more proton than magnesium, so its nucleus will have a more positive charge. This means there will be a greater attraction between the nucleus and the outermost electron, and more energy is needed for this electron to leave the atom and for it to become ionised.

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Answer 2

Answer:

Aluminium

Aluminium has one more proton than magnesium, so its nucleus will have a more positive charge. This means there will be a greater attraction between the nucleus and the outermost electron, and more energy is needed for this electron to leave the atom and for it to become ionised.