1. I’ve highlighted the group that halogens are in.
Write what group number it is _____________

2. Fluorine (F) Chlorine (Cl) Bromine (Br) Iodine (I) Astatine (At)
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)

3. Can be bent and re-shaped Low melting point
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
Low melting point
Conducts heat and electricity badly
Conducts electricity well

4. The halogens all form coloured gases
Underline the correct word…
The gases get darker/lighter with increasing atomic number.
Chlorine =
Pale yellow
Bromine =
Orange
Iodine =
Dark purple

5. These are all the halogens (group 7 elements).
Write the atomic number of Fluorine (F) ____________

6. Solid/liquid/gas at room temperature
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:
Halogen
Melting point (oC)
Boiling point
(oC)
Solid/liquid/gas at room temperature
Chlorine
-110
-34
Bromine -7 59
Liquid
Iodine
114
184

7. 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

8. Halogens
Iodine
Group 7
Darker 7
Chlorine
Toxic (kills things)