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Can anyone answer these?

Can anyone answer these?
asked 68.8k views
2 votes
Can anyone answer these?

Can anyone answer these?-example-1
asked
User Neuronaut
by
8.3k points

1 Answer

4 votes

Answer:

18 is a

19 is c

20 i am not sure

Step-by-step explanation:

18)nucleus contains protons and neutrons

answered
User Dhauptman
by
8.1k points
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