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Cloud [144]
3 years ago
6

How can you tell that a gas is a halogen? ___?

Chemistry
1 answer:
OLEGan [10]3 years ago
8 0
If it is located at the second to last row of the periodic table (the halogen family), has seven electrons on it's outer shell, and has an oxidation number of -1, it is a halogen.
Hope this helps : D
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