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I’ve highlighted the group that halogens are in.
Write what group number it is _____________
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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)
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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
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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
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These are all the halogens (group 7 elements).
Write the atomic number of Fluorine (F) ____________
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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
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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)
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