Group 7 elements, reactivity and displacement

Group 7

Halogens

Metals or non metals?

Non metals

Fluorine formula

F Little 2

Fluorine state at room temp

Gas

Chlorine formula

Cl (little 2)

Chlorine state at room temp

Gas

Bromine formula

Br (little 2)

Bromine state at room temp

Liquid

Iodine formula

I (little 2)

Iodine state at room temp

Solid

Melting and boiling point

Increases down the group

Reactivity

Decreases down the group

• As you move down the group:

• The atoms increase in size

• The outer shell is further away from the nucleus, and there are more shells between the nucleus and outer shell

• The electrostatic attraction from the nucleus to the outer shell is weaker so it is harder to gain one electron to fill the outer shell

Displacement

When an more reactive elements take the place of less reactive ones in a compound