Periodic Table
73
Ta
180.95
Tantalum
Transition MetalCorrosion resistant; capacitors; surgical implants.
Electronic Configuration
[Xe] 4f¹⁴ 5d³ 6s²or1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f¹⁴ 5d³ 6s²
Electron shells
2e⁻n=1
8e⁻n=2
18e⁻n=3
32e⁻n=4
11e⁻n=5
2e⁻n=6
Properties
Atomic number
73
Atomic mass
180.95 u
Category
Transition Metal
Block / Group / Period
d · 5 · 6
Valence electrons
2
Oxidation states
+5
Electronegativity
1.5
Atomic radius
200 pm
Ionization energy
761 kJ/mol
Electron affinity
31 kJ/mol
Melting point
3290 K / 3017 °C
Boiling point
5731 K / 5458 °C
Density
16.654 g/cm³
State at 25 °C
solid
Personal Notes
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