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Technetium (Tc)
Atomic number: 43 · Category: transition metal · Group 7 · Period 5 · Phase: Solid
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.
Atomic mass: 98
Density: 11
Melting point: 2430 K
Boiling point: 4538 K
Appearance: shiny gray metal
Source: Wikipedia
Block: d
Molar heat: 24.27
CPK color:#3b9e9e
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d5
Configuration (semantic): [Kr] 4d5 5s2
Shells: 2, 8, 18, 13, 2
Electronegativity (Pauling): 1.9
Electron affinity: 53
Ionization energies: 702, 1470, 2850
Periodic position
Group: 7
Period: 5
xpos: 7
ypos: 5
Spectral/Bohr images
Image
3D Model