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mezya [45]
3 years ago
13

How many neutrons does element x have if it's atomic number is 55 and it's mass number is 155?

Biology
1 answer:
ExtremeBDS [4]3 years ago
6 0
The atomic number is the number of protons and the mass number is the number of protons+neutrons in the nucleus so number of neutrons = 155-55 = 100
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