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Biology, 03.03.2021 01:00 kels7618

Fluorine, chlorine, bromine, iodine, and astatine make up group 17, the halogens. Why are these elements grouped together? A They are all very reactive nonmetals with similar chemical properties.
B They are all nonreactive gases with similar physical properties.
C Their atoms all have 8 electrons in their outer energy levels.
D They all have the same atomic number.​

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Fluorine, chlorine, bromine, iodine, and astatine make up group 17, the halogens. Why are these elem...
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