group 7

group 7 - Group 7, the Halogens Representative Elements 2...

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Group 7, the Halogens
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Group 17—The Halogen Group All the elements in Group 17 are nonmetals except for astatine, which is a radioactive metalloid. Representative Elements 2 These elements are called halogens , which means “salt-former.” All of the halogens form salts with sodium and with the other alkali metals.
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Group 17—The Halogen Group The halogen fluorine is the most reactive of the halogens in combining with other elements. Representative Elements Chlorine is less reactive than fluorine, and bromine is less reactive than chlorine. Iodine is the least reactive of the four nonmetals.
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Some facts… 1)  Reactivity DECREASES as you  go down the group D e c r a s i n g t v y (This is because the electrons are further away from the nucleus and so any extra  electrons aren’t attracted as much). 2)  They exist as diatomic  molecules (so that they both  have a full outer shell): Cl Cl 3)  Because of this fluorine and chlorine are liquid at room temperature and bromine  is a gas
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group 7 - Group 7, the Halogens Representative Elements 2...

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