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IgorLugansk [536]
3 years ago
5

Help me with this pls :)

Biology
2 answers:
ryzh [129]3 years ago
6 0

Answer:

Elements have the same number of valence electrons

Columns 1-18 on periodic table

Elements have similar characteristics

Luba_88 [7]3 years ago
5 0
Elements have the same number of valence electrons, Elements have similar characteristics, Columns 1-18 on periodic table
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