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alekssr [168]
3 years ago
13

I give 10 points for 3 tasks + BRAINLIEST!!!!

Chemistry
1 answer:
Marta_Voda [28]3 years ago
6 0
<span>21. F, Cl and Br.

22. </span>Since it is in Group 3 it will have 3 valence electrons. When you draw the Lewis structure for Aluminum you'll put three<span> "dots" or valence electrons around the element symbol.

23. </span><span>you would need 2 group 17's for every 1 group 2</span>
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