Selenium

Catalogue

Atomic structure

Discovery

Source

Element USES

physical property

Chemical property

Geological data

Biology data

Atomic structure

Atomic radius/A: 1.22 atomic volume/cm3 / mol: 16.45 covalent radius/A: 1.16

Electronic configuration: 1 2 3 4 s2p6 s2 s2p6d10 s2p4 ion radius/A: 0.5 oxidation state: ± 2 6-trihydroxy-phenylethanone

Discovery

In 1817, the J.J. Berzelius (Stockholm, Sweden) found.

Source

From lead, copper, nickel for the refining process.

Element USES

Used for test, camera, semiconductor, etc.

physical property

Status: the dark grey shiny things stick, or dark red non-metallic crystals. Melting point (℃) : 221 boiling point (℃) : 685 density (g/cc, 300 K) : 4.79

Than hot/J/gK: 0.32 evaporation heat/KJ/mol: 37.7 melting hot/KJ/mol: 6.694

Conductive rate / 106 / cm: 1.0 E-12 coefficient of thermal conductivity/W/cmK: 0.0204

Geological data

Abundance retention time/year: 3000

The sun (relative to the H = 1 x 1012) : sea/P.P.M.

The earth's crust/P.P.M. : 0.05 the Atlantic ocean surface: 0.46 x 10-seven Pacific surface: 0.15 x 10-seven

Atmospheric/P.P.M. (volume) : the Atlantic ocean depths: 1.8 x 10-seven deep in the Pacific: 1.65 x 10-seven

Biology data

The human body the content in liver/P.P.M. : 0.35-2.4

Organs: muscle/P.P.M. : 0.42-1.9

Blood/mg dm-3:0.171 days intake/mg: 0.006-0.2

Bone/P.P.M. : 1-9 (70 Kg) are total body/mg: c. 15

Detailed information

Selenium/Se