Period 4

Ionization Energy and Valence Electrons

Potassium

- Ionization Energy: 418.8

- Valence Electrons: 1


Calcium

- Ionization Energy: 589.8

- Valence Electrons: 2


Scandium

- Ionization Energy: 631

- Valence Electrons: 2


Titanium

- Ionization Energy: 658

- Valence Electrons: 2


Vanadium

- Ionization Energy: 650.3

- Valence Electrons: 5


Chromium

- Ionization Energy: 652.8

- Valence Electrons: 6


Manganese

- Ionization Energy: 717.4

- Valence Electrons: 5


Iron

- Ionization Energy: 759.3

- Valence Electrons: 2


Cobalt

- Ionization Energy: 758.4

- Valence Electrons: 3


Nickel

- Ionization Energy: 736.7

- Valence Electrons: 2


Copper

- Ionization Energy: 745.4

- Valence Electrons: 2


Zinc

- Ionization Energy: 906.4

- Valence Electrons: 2


Gallium

- Ionization Energy: 578.8

- Valence Electrons: 3


Germanium

- Ionization Energy: 762.1

- Valence Electrons: 4


Arsenic

- Ionization Energy: 946.5

- Valence Electrons: 5


Selenium

- Ionization Energy: 940.9

- Valence Electrons: 6


Bromine

- Ionization Energy: 1139.9

- Valence Electrons: 7


Krypton

- Ionization Energy: 1350.7

- Valence Electrons: 8