Rucete ✏ Chemistry In a Nutshell
Ionization energy | In a nutshell
1 The energy needed to take electrons from atoms and make them into cations.
(Ionization energy is the quantity of energy that an isolated)
2 It tends to increase ionization energy as it goes from left to right in the same period.
3 Sequential ionization energy
1. First ionization energy (I1) : Energy required to remove the first electron.
2. Second ionization energy (I2) : Energy required to remove the second electron.
4 The amount of ionization energy
Ionization energies (KJ/mol)
Atom I1 I2 I3 I4
Na 486 4583 6912 9543
Mg 737 1450 7731 10540
Al 579 1817 2745 11577
K 419 3051 4411
5 Decreases from top to bottom within a group
6 Increases from left to right across a period
7 The smaller the ionizing energy, the more likely the metal is to become the cathode of the battery.
The greater the difference in ionizing energy between the two metals used in batteries, they have the higher a voltage.
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Chemistry in a nutshell