science

Halogens


KEY ELEMENT CLASSIFICATION
Chemical Element Symbol Key
2
9
18.998403
Name: Fluorine
Symbol: F
Atomic Weight: 18.998403
Atomic Number: 9
Element Classification: Halogen
Discovered By: Henri Moissan
Discovery Date: 1886 (France)
Name Origin: Latin: fluere (flow).
3
17
35.4527
Name: Chlorine
Symbol: Cl
Atomic Weight: 35.4527
Atomic Number: 17
Element Classification: Halogen
Discovered By: Carl Wilhelm Scheele
Discovery Date: 1774 (Sweden)
Name Origin: Greek: chloros (greenish yellow).
4
35
79.904
Name: Bromine
Symbol: Br
Atomic Weight: 79.904
Atomic Number: 35
Element Classification: Halogen
Discovered By: Antoine J. Balard
Discovery Date: 1826 (France)
Name Origin: Greek: bromos (stench).
5
53
126.90447
Name: Iodine
Symbol: I
Atomic Weight: 126.90447
Atomic Number: 53
Element Classification: Halogen
Discovered By: Bernard Courtois
Discovery Date: 1811 (France)
Name Origin: Greek: iodes (violet colored).
6
85
209.9871
Name: Astatine
Symbol: At
Atomic Weight: 209.9871
Atomic Number: 85
Element Classification: Halogen
Discovered By: D.R.Corson, K.R.MacKenzie, E. Segre
Discovery Date: 1940 (United States)
Name Origin: Greek: astatos (unstable).
7
117
Name: Ununseptium
Symbol: Uus
Atomic Weight: [294]
Atomic Number: 117
Element Classification: Halogen
Discovered By: Joint Institute for Nuclear Research
Discovery Date: 2010 (Russia)
Name Origin: Un (one) un (one) sept (seven)


Back to: periodic table


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