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How many neutrons does an element have if its atomic number is 42 and its mass number is 155? (10 Points)

How many neutrons does an element have if its atomic number is 42 and its mass number is 155? (10 Points)
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How many neutrons does an element have if its atomic number is 42 and its mass number is 155? (10 Points)

User Ericbowden
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The Element would have 197 neutrons

User Robert Smith
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