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Samarium
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. Compounds of samarium(II) are also known, most notably the
monoxide
SmO,
monochalcogenides
SmS, SmSe and SmTe, as well as
samarium(II) iodide
. The last compound is a common
reducing agent
in
chemical synthesis
. Samarium has no significant biological role and is only slightly toxic.
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