what are the factors influence ionization energy
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Nuclear charge and shielding (screening) effect affects ionisation energy. The greater the number of protons, the stronger the nuclear charge. This results in greater attraction for the valence electrons and more energy required to remove them, i.e. higher ionisation energy.
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3 Factors Affecting Ionisation Energy
Size of the positive nuclear charge. As the nuclear charge increases, its attraction for the outermost electron increases and more energy is required to remove an electron. ...
Size of atom (distance of outermost electron from the nucleus) ...
Screening (shielding) effect of inner shell electrons.
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