The exercise was created 2021-03-18 by Enimya. Question count: 6.
Normally, all words in an exercise is used when performing the test and playing the games. You can choose to include only a subset of the words. This setting affects both the regular test, the games, and the printable tests.
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https://spellic.com/eng/exercise/halogens-by-symbol.10352011.html
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