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1If an atom has an outer shell with 3 electrons in it, in which group/period will it be?
- AGroup 3.
- BPeriod 3.
- CNot one of them.
- DI don't know...
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- A-Level Physical Science Quiz on Untitled, created by Lihan Hendrikse on 29/01/2016.
- Author
- Lihan Hendrikse
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- English
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