Pr
Praseodymium · element 59
Lanthanide · Solid at room temperature
Praseodymium is a chemical element with symbol Pr and atomic number 59. Praseodymium is a soft, silvery, malleable and ductile metal in the lanthanide group. It is valued for its magnetic, electrical, chemical, and optical properties.
Key facts
Atomic mass
140.907662 u
how heavy one atom is
Phase (room temp.)
Solid
Density
6.77 g/cm³
how tightly packed it is
Melting point
1208 K (935 °C)
when solid turns to liquid
Boiling point
3403 K (3130 °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
1.13
how strongly it pulls electrons
Electron configuration
[Xe] 4f3 6s2
where its electrons live
Shells
2 · 8 · 18 · 21 · 8 · 2
electrons in each layer, inside to out
Discovered by
Carl Auer von Welsbach
who found it
Appearance
grayish white
what it looks like
Source: Wikipedia