Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92?
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Solution
Answer 52 Explanation: To determine the number of neutrons that zirconium-92 has we will use the formula below: We know the atomic number (40) and we know the atomic mass (92), so all we have to do is plug the numbers into the equation and solve for N: N=92-40=52 There are 52 neutrons in the isotope Zr-92