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svetlana [45]
3 years ago
7

Elements in the same periodic table wich has the same number of valence electrons

Biology
1 answer:
nadezda [96]3 years ago
7 0
Elements In the same group or family in the periodic table have the same number of valence electrons.

For example the halogens all have 7 valence electrons in their outermost electron shell.
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