HELP PLEASE ANSWER PLEASE ITS URGENT!! -unnecessary comments will be reported.

asked Aug 2, 2022 44.0k views

9 votes

HELP PLEASE ANSWER PLEASE ITS URGENT!!

-unnecessary comments will be reported.

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12 votes

Answer:

19. 1, 2, 3, 4, 5, 6, 7, 8

20. Li=1+, Be=2+, B=3+, C=4+

21. N=3-, O=2-, F=1-

Step-by-step explanation:

Neri Barakat answered Aug 5, 2022

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