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Pls help need it NOW

Most of the mass of an atom is concentrated predominantly…

a=in the nucleus

b=in the electrons

c=in the neutrons

d=in the positrons

User Brad Campbell
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2 Answers

27 votes
27 votes

Answer:

A

Step-by-step explanation:

User Cdignam
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9 votes
9 votes
it’s a... in the nucleus
User Danielspaniol
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