1. HALOGENS
The halogens are five non-metallic elements found in group 7 of the periodic table. The term "halogen" means "salt-former" and compounds containing halogens are called "salts". All halogens have 7 electrons in their outer shells, giving them an oxidation number of -1. The halogens exist, at room temperature, in all three states of matter:
Solid- Iodine, Astatine
Liquid- Bromine
Gas- Fluorine, Chlorine
The Halogens are:
Fluorine
Chlorine
Bromine
Iodine
Astatine

3. FLOURINE
Name: Fluorine Symbol: F Atomic Number: 9 Atomic Mass: amu Melting Point: °C ( °K, °F) Boiling Point: °C (85.01 °K, °F) Number of Protons/Electrons: 9 Number of Neutrons: 10 Classification: Halogen Crystal Structure: Cubic 293 K: g/cm3 Color: Greenish

4. CHLORINE
Name: Chlorine Symbol: Cl Atomic Number: 17 Atomic Mass: amu Melting Point: °C ( °K, °F) Boiling Point: °C ( °K, °F) Number of Protons/Electrons: 17 Number of Neutrons: 18 Classification: Halogen Crystal Structure: Orthorhombic 293 K: g/cm3 Color: green

5. BROMINE
Name: Bromine Symbol: Br Atomic Number: 35 Atomic Mass: amu Melting Point: -7.2 °C ( °K, °F) Boiling Point: °C ( °K, °F) Number of Protons/Electrons: 35 Number of Neutrons: 45 Classification: Halogen Crystal Structure: Orthorhombic 293 K: g/cm3 Color: Red

6. IODINE
Name: Iodine Symbol: I Atomic Number: 53 Atomic Mass: amu Melting Point: °C ( °K, °F) Boiling Point: °C ( °K, °F) Number of Protons/Electrons: 53 Number of Neutrons: 74 Classification: Halogen Crystal Structure: Orthorhombic 293 K: 4.93 g/cm3 Color: blackish

7. ATOMIC STRUCTURE
Fluorine
Chlorine
Bromine
Astatine
Iodine

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data/intro_groupvii_data.html
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