Pt
Platinum · element 78
Transition Metal · Solid at room temperature
Platinum is a chemical element with symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, gray-white transition metal. Its name is derived from the Spanish term platina, which is literally translated into "little silver".
Key facts
Atomic mass
195.0849 u
how heavy one atom is
Phase (room temp.)
Solid
Density
21.45 g/cm³
how tightly packed it is
Melting point
2041.4 K (1768 °C)
when solid turns to liquid
Boiling point
4098 K (3825 °C)
when liquid turns to gas
Period
6
its row in the periodic table
Group
10
its column in the periodic table
Block
D-block
the neighbourhood it lives in
Electronegativity
2.28
how strongly it pulls electrons
Electron configuration
[Xe] 4f14 5d9 6s1
where its electrons live
Shells
2 · 8 · 18 · 32 · 17 · 1
electrons in each layer, inside to out
Discovered by
Antonio de Ulloa
who found it
Appearance
silvery white
what it looks like
Source: Wikipedia