Re
Rhenium · element 75
Transition Metal · Solid at room temperature
Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust.
Key facts
Atomic mass
186.2071 u
how heavy one atom is
Phase (room temp.)
Solid
Density
21.02 g/cm³
how tightly packed it is
Melting point
3459 K (3186 °C)
when solid turns to liquid
Boiling point
5869 K (5596 °C)
when liquid turns to gas
Period
6
its row in the periodic table
Group
7
its column in the periodic table
Block
D-block
the neighbourhood it lives in
Electronegativity
1.9
how strongly it pulls electrons
Electron configuration
[Xe] 4f14 5d5 6s2
where its electrons live
Shells
2 · 8 · 18 · 32 · 13 · 2
electrons in each layer, inside to out
Discovered by
Masataka Ogawa
who found it
Named by
Walter Noddack
who gave it its name
Appearance
silvery-grayish
what it looks like
Source: Wikipedia