# Isotopes - Page 6

Questions

- Is it possible for two different substances to contain the same number of protons but different atomic numbers?
- How would you write the symbol for carbon -14 including atomic mass and number?
- How do isotopes of a given element differ? How am they similar?
- How do isotopes differ from each other?
- What is a radioactive isotope?
- What is the average atomic mass of chlorine if it has isotopes of masses 36.96590 and 34.96885, which are 24.47% and 75.53% abundant, respectively?
- Nitrogen has two isotopes, N-14 and N-15, with atomic masses of 14.00031 amu and 15.001 amu, respectively. What is the percent abundance of N-15?
- What is the most common isotope of chlorine?
- What is an example of a practice problem with isotopes?
- Given that P-31 is the only natural isotope of phosphorus, what is the mass of one P atom and the mass of Avogadro's number of P atoms?
- What are the two stable isotopes that chlorine is commonly found in?
- What is the molar mass of the isotope lead-208 (#208Pb#)?
- What is the percentage occurrence of the isotopes #""^35Cl#, and #""^37Cl# is the average atomic mass of chlorine is #35.45*"amu"#?
- The atomic weight of a newly discovered e ement is 98.225 amu. It has two naturally occuring isotopes. One isotope has a mass of 96.780 amu. The second isotope has a percent abundance of 41.7%. What is the mass of the second isotope?
- The half-life of chromium-51 is 28 days. If you start with 640 g, how much will be left after 56 days?
- What are some ways in which carbon-12, carbon-13, and carbon-14 are alike?
- Which isotope is more likely to bond with oxygen, C-12 or C-14?
- What isotope has 14 protons and 14 neutrons?
- Carbon has a third isotope, named carbon-13. How many protons and neutrons are found in each atom of carbon-13. Carbon-13 is a stable isotope, like carbon-12. How useful would carbon-13 be for radiometric dating?
- All isotopes of a particular element have the same atomic number. How then do the isotopes of a particular element differ?