IsotopeAtomic numberNumber of protonsMass numberNumber of neutronsStable/Unstable88168stable88179stable881810stableQuestion 15SavedExplain in your own words how you calculated the number of neutrons in these oxygen isotopes. Then sum up your answer by writing an equation that begins: "number of neutrons = ..."
Question
IsotopeAtomic numberNumber of protonsMass numberNumber of neutronsStable/Unstable88168stable88179stable881810stableQuestion 15SavedExplain in your own words how you calculated the number of neutrons in these oxygen isotopes. Then sum up your answer by writing an equation that begins: "number of neutrons = ..."
Solution
The number of neutrons in an isotope can be calculated by subtracting the atomic number (which is also the number of protons) from the mass number.
For the first oxygen isotope, the atomic number is 8, which means there are 8 protons. The mass number is 16. So, to find the number of neutrons, you subtract the number of protons from the mass number: 16 - 8 = 8 neutrons.
For the second oxygen isotope, the atomic number is still 8, but the mass number is 17. So, the number of neutrons is: 17 - 8 = 9 neutrons.
For the third oxygen isotope, the atomic number is again 8, and the mass number is 18. So, the number of neutrons is: 18 - 8 = 10 neutrons.
So, the equation to find the number of neutrons is: "number of neutrons = mass number - atomic number".
Similar Questions
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