Period 4
Ionization Energy and Valence Electrons
- 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