Atomic Element Z = 73 • Transition Metal
Tantalum (Ta) — Atomic Data, Electron Shells & Reactions
Tantalum (symbol Ta, atomic number 73) has a standard atomic weight of 180.95 u and ground-state configuration [Xe] 4f14 5d3 6s2.
Atomic Number (Z)
73
IUPAC Symbol
Ta
Standard Atomic Weight
180.95 g/mol
Period / Group / Block
6 / 5 / d-block
Condensed Electron Config
[Xe] 4f14 5d3 6s2
Full Subshell Config
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d3 6s2
Principal Shell Occupancy
[2, 8, 18, 32, 11, 2]
Pauling Electronegativity
1.5
First Ionization Energy
761 kJ/mol
Covalent Radius
170 pm
Melting Point
3290 K (3016.85 °C)
Boiling Point
5731 K (5457.85 °C)
Density
16.654 g/cm³
Oxidation States
+5
Ta (Z=73) — Valence shell highlighted in vermilion