Download - I’ve highlighted the group that halogens are in. Write what group number it is _____________
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I’ve highlighted the group that halogens are in.
Write what group number it is _____________
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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)
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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
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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.
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These are all the halogens (group 7 elements).
Write the atomic number of Fluorine (F) ____________
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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:
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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
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Halogens Iodine
Group 7 Darker 7
Chlorine Toxic (kills things)