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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.

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Presentation on theme: "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."— Presentation transcript:

1 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

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3 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/cm 3 Color: GreenishHalogen

4 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/cm 3 Color: greenHalogen

5 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/cm 3 Color: RedHalogen

6 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/cm 3 Color: blackishHalogen

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11 data/intro_groupvii_data.html Students of The Madras Seva Sadan Hr. Sec.School, Chetput, Chennai-31. K.S.Shalini B.Mano G.Jayasree K.Kavitha K.Sindu


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