Halogens
Name: Fluorine
Symbol: F
Atomic Number: 9
Atomic Mass: 18.9
Number of Protons/Electrons: 9
Number of Neutrons: 10
Classification: Halogens
Discovery: 1886
Discoverer: Joseph Henri Moissan
Uses: Refrigerants
Symbol: F
Atomic Number: 9
Atomic Mass: 18.9
Number of Protons/Electrons: 9
Number of Neutrons: 10
Classification: Halogens
Discovery: 1886
Discoverer: Joseph Henri Moissan
Uses: Refrigerants
Name: Chlorine
Symbol: Cl
Atomic Number: 17
Atomic Mass: 35.4
Number of Protons/Electrons: 17
Number of Neutrons: 18
Classification: Halogens
Discovery: 1774
Discoverer: Carl Wilhelm Scheele
Uses: Water purification
Symbol: Cl
Atomic Number: 17
Atomic Mass: 35.4
Number of Protons/Electrons: 17
Number of Neutrons: 18
Classification: Halogens
Discovery: 1774
Discoverer: Carl Wilhelm Scheele
Uses: Water purification
Name: Bromine
Symbol: Br
Atomic Number: 35
Atomic Mass: 79.9
Number of Protons/Electrons: 35
Number of Neutrons: 45
Classification: Halogens
Discovery: 1826
Discoverer: Antoine J. Balard
Uses: Poisonous
Symbol: Br
Atomic Number: 35
Atomic Mass: 79.9
Number of Protons/Electrons: 35
Number of Neutrons: 45
Classification: Halogens
Discovery: 1826
Discoverer: Antoine J. Balard
Uses: Poisonous
Name: Iodine
Symbol: I
Atomic Number: 53
Atomic Mass: 126.9
Number of Protons/Electrons: 53
Number of Neutrons: 74
Classification: Halogens
Discovery: 1811
Discoverer: Bernard Courtois
Uses: required in humans
Symbol: I
Atomic Number: 53
Atomic Mass: 126.9
Number of Protons/Electrons: 53
Number of Neutrons: 74
Classification: Halogens
Discovery: 1811
Discoverer: Bernard Courtois
Uses: required in humans
Name: Astatine
Symbol: At
Atomic Number: 85
Atomic Mass: 210
Number of Protons/Electrons: 85
Number of Neutrons: 125
Classification: Halogens
Discovery: 1940
Discoverer: D.R. Corson
Uses: Non
Symbol: At
Atomic Number: 85
Atomic Mass: 210
Number of Protons/Electrons: 85
Number of Neutrons: 125
Classification: Halogens
Discovery: 1940
Discoverer: D.R. Corson
Uses: Non