I’ve highlighted the group that halogens are in.

Write what group number it is _____________

One of the Halogens is used in swimming pools as a disinfectant (to kill germs).

Circle the halogen you think it is from the list on the right.

Fluorine (F)

Chlorine (Cl)

Bromine (Br)

Iodine (I)

Astatine (At)

Halogens are non metals. They have the typical properties of non metals.

Circle the two properties below that are typical property of a non-metal

Can be bent and re-shaped

Can be bent and re-shaped

Conducts electricity well

Conducts electricity well

Conducts heat and electricity

badly

Conducts heat and electricity

badly

Low melting point

Low melting point

Chlorine =Pale yellow

The halogens all form coloured gases

Bromine =Orange

Iodine =Dark purple

Underline the correct word…

The gases get darker/lighter with increasing atomic number.

These are all the halogens (group 7 elements).

Write the atomic number of Fluorine (F) ____________

Halogen Melting point (oC)

Boiling point(oC)

Solid/liquid/gas at

room temperature

Chlorine -110 -34Bromine -7 59 Liquid

Iodine 114 184

If the melting point (the temperature it melts at) is below (colder than) 25oC it is a liquid at room temperature

If the boiling point (the temperature it evaporates at) is below (colder than) 25oC it is a gas at room temperature.

Fill in the last column in the table below:

The atomic number of Chlorine is 17 – that means it has 17 electrons in its atom

Please draw the electrons onto the diagram of a chlorine atom to the right

• There can be a maximum of 2 electrons in shell 1

• And a maximum of 8 electrons in shell 2

Halogens Iodine

Group 7 Darker 7

Chlorine Toxic (kills things)