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dmitriy555 [2]
3 years ago
9

An neutral atom has 40 protons and 10 neutrons what is the mass number

Chemistry
2 answers:
mash [69]3 years ago
8 0

Answer:

60

Explanation:

mass number=proton+neutron

=40+10

mass number=50

olya-2409 [2.1K]3 years ago
5 0

Answer:

50

Explanation:

40-10 = 30…...…............

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