44 - Ruthenium transition metal
Discovered by Karl Ernst Claus in 1844
Ruthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is inert to most other chemicals.
H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
57-71 La-Lu Lanthanides
89-103 Ac-Lr Actinides
| 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 | 15 | 2 in 4s + 6 in 4p + 7 in 4d |
| 5 | 1 | 1 in 5s |
101 u Atomic Mass
1.9 Å Atomic Radius
4.42k K Boiling Point
1.46 Å Covalent Radius
12.4 g/cm³ Density
101 Electron Affinity
2.2 Electronegativity
7.36 eV First Ionization Energy
2.52k K Melting Point
5 Number of Shells
44 Atomic Number
2, 8, 18, 15, 1 Electron Shell Occupations