Sc
Scandium · element 21
Transition Metal · Solid at room temperature
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.
Key facts
Atomic mass
44.9559085 u
how heavy one atom is
Phase (room temp.)
Solid
Density
2.985 g/cm³
how tightly packed it is
Melting point
1814 K (1541 °C)
when solid turns to liquid
Boiling point
3109 K (2836 °C)
when liquid turns to gas
Period
4
its row in the periodic table
Group
3
its column in the periodic table
Block
D-block
the neighbourhood it lives in
Electronegativity
1.36
how strongly it pulls electrons
Electron configuration
[Ar] 3d1 4s2
where its electrons live
Shells
2 · 8 · 9 · 2
electrons in each layer, inside to out
Discovered by
Lars Fredrik Nilson
who found it
Appearance
silvery white
what it looks like
Source: Wikipedia