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10203040506070809010011000.511.522.53‌ Å

43 - Technetium transition metal

Atomic Mass (u)

98

Density (g/cm³)

11

Phase

Solid

Year of Discovery

1937
TechnetiumTcElectron 1Electron 2Electron 1Electron 2Electron 3Electron 4Electron 5Electron 6Electron 7Electron 8Electron 1Electron 2Electron 3Electron 4Electron 5Electron 6Electron 7Electron 8Electron 9Electron 10Electron 11Electron 12Electron 13Electron 14Electron 15Electron 16Electron 17Electron 18Electron 1Electron 2Electron 3Electron 4Electron 5Electron 6Electron 7Electron 8Electron 9Electron 10Electron 11Electron 12Electron 13Electron 1Electron 2

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.

43 Atomic Number
98  u Atomic Mass
2473.15  K Melting Point
5150  K Boiling Point
11  g/cm³ Density
2  Å Atomic Radius
1.47  Å Covalent Radius
1.9 Electronegativity
7.28  eV First Ionization Energy
53 Electron Affinity
5 Number of Shells
2, 8, 18, 13, 2 Electron Shell Occupations
null  J/g Specific Heat