45 - Rhodium transition metal
Discovered by William Wollaston in 1803
Rhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, and chemically inert transition metal. It is a member of the platinum group.
Periodic table
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 8 | 2 in 2s + 6 in 2p |
| 3 | 18 | 2 in 3s + 6 in 3p + 10 in 3d |
| 4 | 16 | 2 in 4s + 6 in 4p + 8 in 4d |
| 5 | 1 | 1 in 5s |
Electron shells
silvery white metallic Appearance
103 u Atomic Mass
1.35 Å Atomic Radius
3.97k K Boiling Point
9 Group
3 Common Oxidation States
1.42 Å Covalent Radius
12.4 g/cm³ Density
110 kJ/mol Electron Affinity
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d8 Electron Configuration
[Kr] 4d8 5s1 Electron Configuration (semantic)
2.28 Electronegativity
45 Electrons
7.46 eV First Ionization Energy
3, 4 ICSD Oxidation States
719.7, 1740, 2997 kJ/mol Ionization Energies
2.24k K Melting Point
65 Mendeleev Number
25 J/(mol·K) Molar Heat
5 Number of Shells
58 Neutrons
45 Atomic Number
20 Number of Isotopes
-1, 1, 2, 3, 4, 5, 6 Oxidation States
5 Period
Solid Phase
45 Protons
2, 8, 18, 16, 1 Electron Shell Occupations