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Scandium (Sc)
Atomic number: 21 · Category: transition metal · Group 3 · Period 4 · Phase: Solid
Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia.
Atomic mass: 44.9559085
Density: 2.985
Melting point: 1814 K
Boiling point: 3109 K
Appearance: silvery white
Source: Wikipedia
Block: d
Molar heat: 25.52
CPK color:#e6e6e6
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d1
Configuration (semantic): [Ar] 3d1 4s2
Shells: 2, 8, 9, 2
Electronegativity (Pauling): 1.36
Electron affinity: 18
Ionization energies: 633.1, 1235, 2388.6, 7090.6, 8843, 10679, 13310, 15250, 17370, 21726, 24102, 66320, 73010, 80160, 89490, 97400, 105600, 117000, 124270, 547530, 582163
Periodic position
Group: 3
Period: 4
xpos: 3
ypos: 4
Spectral/Bohr images
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3D Model