1. 52
Te
TELURO-TELLURIUM
MASS: 127.6 u
1s2
2s2
2p6
3s2
3p6
4s2
3d10
4p6
5s2
4d10
5p4
MELTING POINT: 722.66 K
BOILING POINT: 1261 K
DENSITY: 6.24 g·cm−3
DISCOVERY: 1782 (Franz Joseph Müller)
Tellurium was discovered in Transylvania. It is a
brittle, mildly toxic, rare, silver-white metalloid which looks similar to tin,
tellurium is chemically related to selenium and sulfur. It dues to its formation
of a volatile hydride which caused the element to be lost to space as a gas
during the hot nebular formation of the planet. The primary use of tellurium is
in alloys, foremost in steel and copper to improve machinability. It hasn´t got a
biological function.