Ionization Energy Trends

Ionization Energy Trends - aneutralga

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Ionization Energy Trends in the Periodic Table The ionization energy of an atom is the amount of energy  required  to remove an  electron from the gaseous form of that atom or ion. 1 st  ionization energy -  The energy required to remove the highest energy electron from  a neutral gaseous atom. For Example: Na (g) Na + (g) + e - I 1 = 496 kJ/mole Notice that the ionization energy is positive. This is because it  requires  energy to remove  an electron. 2 nd  ionization energy -  The energy required to remove a  second  electron from a singly  charged gaseous cation. For Example: Na + (g) Na 2+ (g) + e - I 2 = 4560 kJ/mole The second ionization energy is almost  ten times  that of the first because the number of  electrons causing repulsions is reduced. 3 rd  ionization energy -  The energy required to remove a  third  electron from a doubly  charged gaseous cation. For Example:
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Ionization Energy Trends - aneutralga

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