Sm
Samarium · element 62
Lanthanide · Solid at room temperature
Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that readily oxidizes in air. Being a typical member of the lanthanide series, samarium usually assumes the oxidation state +3.
Key facts
Atomic mass
150.362 u
how heavy one atom is
Phase (room temp.)
Solid
Density
7.52 g/cm³
how tightly packed it is
Melting point
1345 K (1072 °C)
when solid turns to liquid
Boiling point
2173 K (1900 °C)
when liquid turns to gas
Period
6
its row in the periodic table
Group
3
its column in the periodic table
Block
F-block
the neighbourhood it lives in
Electronegativity
1.17
how strongly it pulls electrons
Electron configuration
[Xe] 4f6 6s2
where its electrons live
Shells
2 · 8 · 18 · 24 · 8 · 2
electrons in each layer, inside to out
Discovered by
Lecoq de Boisbaudran
who found it
Appearance
silvery white
what it looks like
Source: Wikipedia