Periodic Table · element
Iodine
I · Z 53
- atomic number
- 53
- atomic mass
- 126.9
- notation
- I
- group
- 17: Fluorine
- period
- 5
- state0c
- Solid
- state20c
- Solid
- occurrence
- Primordial
- density
- 4.933
- melting pt
- 113.5
- boiling pt
- 184.3
- discovered
- 1811
- abundance
- 0.45
- bio class
- Trace
- bio role
- Thyroid hormones, and nothing else. Its deficiency is the commonest preventable cause of intellectual disability.
- ore grade
- 400
- ore minerals
- iodate in Chilean caliche; iodide in oilfield brines
- mined as
- Primary
extraction
Chile leaches iodate out of nitrate caliche in heaps and reduces it with sulfur dioxide; Japan strips iodide from natural-gas brines by blowing it out with air. Between them, most of the world.
categories
#Nonmetal#Halogens#Diatomicnonmetal
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