Technetium (Tc) in the periodic table — PeriodicTable

Technetium (Tc) in the periodic tableTechnetium is element 43, a transition metal of the d block, in group 7, period 5. Its ground-state configuration is [Kr] 4d5 5s2, and it usually shows the oxidation states 0, 7.It was discovered in 1937, by Perrier and Segrè.Name origin: the Greek tekhnètos meaning 'artificial'. Blank rows are columns the sheet does not measure for this element.

Property

Value

Unit

Atomic weight

98

Da

Electronegativity

1.9

First ionisation energy

702

kJ/mol

Covalent radius

156

pm

Melting point

2430

K

Boiling point

4538

K

Density

11.5

g/cm³

Abundance

0

mg/kg

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