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An element has atomic number 10 and an atomic mass of 20. How many neutrons are in the atom of this element?
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An element has atomic number 10 and an atomic mass of 20. How many neutrons are in the atom of this element?

User Rempsyc
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the answer is 10 neutrons

User Cylian
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The atomic number is the same as proton number. And the atomic mass is equal to the sum of protons and neutrons. So the neutrons in the atom of this element is 10.
User Langley
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