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Group 7 Elements & Compounds

Group 7 Elements & Compounds. Halogens by MMNI. The Halogens. Group 7 is a non-metal group Contains – fluorine, chlorine, bromine, iodine, astatine. How can this be used in real life?. Sodium chloride (compound of chlorine) is salt! It is used in lighting

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Group 7 Elements & Compounds

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  1. Group 7 Elements & Compounds Halogens by MMNI

  2. The Halogens • Group 7 is a non-metal group • Contains – fluorine, chlorine, bromine, iodine, astatine

  3. How can this be used in real life? • Sodium chloride (compound of chlorine) is salt! • It is used in lighting • Chlorine is used to sterilise the drinking water supply • Iodine can be used to sterilise wounds

  4. Appearance • Fluorine is a poisonous pale yellow gas • Chlorine is a poisonous pale green gas • Bromine is a toxic and corrosive brown unpredictable liquid • Iodine is a shiny black solid

  5. Similar Properties • The halogens all have similar properties because their atoms all have the same number of electrons in their outer shells. • Form colored vapors • Are poisonous • Are brittle and crumbly in their solid form, and non-conductors of electricity (all typical properties of non-metals) • As you get down the group the boiling and melting points get higher

  6. Reactivity • Are very reactive. Form example they react vigorously with metals such as sodium to form compounds called halides. • They are reactive because their atoms are just one electron short of a full electron shell.

  7. Questions • Which group are they in? • Describe the appearance of the halogens? • Explain why the halogens are reactive?

  8. Still don’t get it? Don’t worry neither do we O.o http://www.rsc.org/chemsoc/visualelements/pages/data/intro_groupvii_data.html - sort of informative http://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway/periodictable/group7rev1.shtml - I REALLY RECOMMEND this website! It has some very useful information

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