Te
Tellurium · element 52
Metalloid · Solid at room temperature
Tellurium is a chemical element with symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur.
Key facts
Atomic mass
127.603 u
how heavy one atom is
Phase (room temp.)
Solid
Density
6.24 g/cm³
how tightly packed it is
Melting point
722.66 K (450 °C)
when solid turns to liquid
Boiling point
1261 K (988 °C)
when liquid turns to gas
Period
5
its row in the periodic table
Group
16
its column in the periodic table
Block
P-block
the neighbourhood it lives in
Electronegativity
2.1
how strongly it pulls electrons
Electron configuration
[Kr] 4d10 5s2 5p4
where its electrons live
Shells
2 · 8 · 18 · 18 · 6
electrons in each layer, inside to out
Discovered by
Franz-Joseph Müller von Reichenstein
who found it
Source: Wikipedia