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How many neutrons does element X have if its atomic number is 44 and its mass number is 151?
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How many neutrons does element X have if its atomic number is 44 and its mass number is 151?

User Ashwini Shahapurkar
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To find the number of neutrons, you subtract the atomic number from the mass number of element X. So in this case, it'll be 151-44= the number of neutrons.
User Dave Newton
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