Neon has three naturally occuring isotopes.The abundance of ²⁰Ne is 90.48% and ²²Ne is 9.25%.What is the percent abundance of ²¹Ne? A)9.25% B)0.27% C)49.9% D)33.2% E)81.2%

Question

Quizplus · Accepted Answer

The percent abundances of all isotopes must add up to 100%. Given that Ne-20 is 90.48% and Ne-22 is 9.25%, we can calculate the abundance of Ne-21 by subtracting these values from 100%. 100% - 90.48% - 9.25% = 0.27%.

Neon Has Three Naturally Occuring Isotopes