Elements in Group 17 (3)

Chemistry

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Changes in Physical Properties of Elements When Going Down Group 17 (2)

Going down the group, the increase in molecular size will cause the attraction force between molecules to become stronger

Changes in Physical Properties of Elements When Going Down Group 17 (3)

The melting point and boiling point of halogens will increase because more heat energy is required to overcome the intermolecular forces

Changes in Physical Properties of Elements When Going Down Group 17 (4)

The density of elements also increases with the increase in mass when going down the group

Changes in Physical Properties of Elements When Going Down Group 17 (5)

Group 17 elements have different colours

Changes in Physical Properties of Elements When Going Down Group 1 (6)

Chlorine gas is greenish yellow, liquid bromine is reddish brown while solid iodine is purplish black

Chemical Properties of Group 17 Elements (1)

Group 17 elements have seven electrons in the valence shell

Chemical Properties of Group 17 Elements (2)

In chemical reactions, these atoms receive one electron and form ions with –1 charge

Reaction of Group 17 Elements with Water, Metal and Alkali (1)

Chlorine, bromine and iodine have the same chemical properties but different reactivity

Reaction of Group 17 Elements with Water, Metal and Alkali (2)

When halogens react with water, an acidic solution is formed

Reaction of Group 17 Elements with Water, Metal and Alkali (3)

When halogens react with metal, a metal halide is formed

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