Periodic Table · element
Chlorine
Cl · Z 17
- atomic number
- 17
- atomic mass
- 35.45
- notation
- Cl
- group
- 17: Fluorine
- period
- 3
- state0c
- Gas
- state20c
- Gas
- occurrence
- Primordial
- density
- 0.003214
- melting pt
- -101
- boiling pt
- -34.04
- discovered
- 1774
- abundance
- 145
- bio class
- Bulk
- bio role
- The counter-ion to sodium and potassium, and the acid in stomach hydrochloric acid.
- ore grade
- 600000
- ore minerals
- halite; brines
- mined as
- Primary
extraction
From the same salt as sodium. Chlorine gas is made by the chlor-alkali process — electrolysing brine in membrane cells — with caustic soda and hydrogen as co-products, one of the largest chemical industries in the world.
categories
#Nonmetal#Halogens#Diatomicnonmetal
Referenced by
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