NO. 073Transition

Ta

Tantalum

Tantalum is used in electronics and medical implants due to its biocompatibility.

Crystal Structure

Body-centered cubic (bcc)

Atomic Mass180.95 u

Density16.65 g/cm³

Melting Point3290 K

Boiling Point5731 K

Atomic Radius146 pm

Electronegativity1.5

Ionization Energy761 kJ/mol

Electron Affinity31 kJ/mol

Bonding TypeMetallic

Oxidation States5

Acid/BaseBasic

ReactivityLow

Electron Configuration

[Xe] 4f14 5d3 6s2

Discovered ByAnders Gustaf Ekeberg

Year1802

Known Isotopes

Ta-181