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Modern Periodic Table

Zirconium has...

Question

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

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