43 Tc 98

Technetium

TRANSITION METAL

Phase: Solid

Discovered: Emilio Segrè

Block: D

Summary

Technetium (/tɛkˈniːʃiəm/) is a chemical element with symbol Tc and atomic number 43. It is the element with the lowest atomic number in the periodic table that has no stable isotopes:every form of it is radioactive. Nearly all technetium is produced synthetically, and only minute amounts are found in nature.

Appearance: shiny gray metal

Source: Wikipedia

Physical Properties

Atomic Mass 98 u

Density 11 g/cm³

Melting Point 2430 K

Boiling Point 4538 K

Molar Heat 24.27 J/(mol·K)

Electron Affinity 53 kJ/mol

Ionization Energies

1^st: 702 kJ/mol

2^nd: 1470 kJ/mol

3^rd: 2850 kJ/mol