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.

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Presentation transcript:

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

FLOURINE Name: Fluorine Symbol: F Atomic Number: 9 Atomic Mass: 18.998404 amu Melting Point: -219.62 °C (53.530006 °K, -363.31598 °F) Boiling Point: -188.14 °C (85.01 °K, -306.652 °F) Number of Protons/Electrons: 9 Number of Neutrons: 10 Classification: Halogen Crystal Structure: Cubic Density @ 293 K: 1.696 g/cm3 Color: Greenish

CHLORINE Name: Chlorine Symbol: Cl Atomic Number: 17 Atomic Mass: 35.4527 amu Melting Point: -100.98 °C (172.17 °K, -149.764 °F) Boiling Point: -34.6 °C (238.55 °K, -30.279997 °F) Number of Protons/Electrons: 17 Number of Neutrons: 18 Classification: Halogen Crystal Structure: Orthorhombic Density @ 293 K: 3.214 g/cm3 Color: green

BROMINE Name: Bromine Symbol: Br Atomic Number: 35 Atomic Mass: 79.904 amu Melting Point: -7.2 °C (265.95 °K, 19.04 °F) Boiling Point: 58.78 °C (331.93 °K, 137.804 °F) Number of Protons/Electrons: 35 Number of Neutrons: 45 Classification: Halogen Crystal Structure: Orthorhombic Density @ 293 K: 3.119 g/cm3 Color: Red

IODINE Name: Iodine Symbol: I Atomic Number: 53 Atomic Mass: 126.90447 amu Melting Point: 113.5 °C (386.65 °K, 236.3 °F) Boiling Point: 184.0 °C (457.15 °K, 363.2 °F) Number of Protons/Electrons: 53 Number of Neutrons: 74 Classification: Halogen Crystal Structure: Orthorhombic Density @ 293 K: 4.93 g/cm3 Color: blackish

ATOMIC STRUCTURE Fluorine Chlorine Bromine Astatine Iodine

BY www.public.asu.edu/~jpbirk/CHM- www.chemistry.ohio-state.edu/~lowary/ www.chemicalelements.com/groups/halogens.html www.chemsoc.org/viselements/pages/ data/intro_groupvii_data.html THANK U FOR ALL BY Students of The Madras Seva Sadan Hr. Sec.School, Chetput, Chennai-31. K.S.Shalini B.Mano G.Jayasree K.Kavitha K.Sindu