Transition metal

Technetium

Technetium (Tc) has atomic number 43. PubChem classifies it as transition metal.

Atomic number

43

Symbol

Tc

Atomic weight (source value)

96.90636

Electron configuration

[Kr]5s2 4d5

Standard state

Solid

Electronegativity (Pauling)

1.9

Melting point (K)

2430

Boiling point (K)

4538

Density (g/cm³)

11

Oxidation states

+7, +6, +4

Understanding this entry

Atomic number is the number of protons in the nucleus. Properties are reference values and may depend on conditions and measurement conventions. An atomic weight is not the mass of every isotope. For elements without a standard atomic weight, a source may report an isotope mass number. Blank source values are shown as unavailable rather than estimated.

Further reading and reference: NIH PubChem source dataset ↗. Values and educational summaries are not a substitute for specialised advice.