Ru
Ruthenium
Z 44 101.07 g/molTransition Metal
Nucleus
44 Protons
57 Neutrons
44 Electrons (8 Valence)
Shell distribution: K2 • L8 • M18 • N15 • O1 • P0 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[Kr]4d75s1
Oxidation States
CommonRare
0
Pick a state to see its ions
Radii
Empirical
130 pm1.3 Å
Calculated
178 pm1.78 Å
Covalent
146±7 pm1.46±0.07 Å
Van der Waals
207 pm2.07 Å
IonicRu3+
68 pm0.68 Å
Crystal Structure
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Hexagonal close-packed
Pearson symbol
hP2
Space group
P63/mmc No. 194