1. How do the isotopes hydrogen-1 and hydrogen-2 differ?
2. How do the particles S and S-2 differ?
3. The average atomic mass of an element found on the periodic table depends on what?
4. Iodine 131 goes through beta emission. What is the resulting particle?
5. What is the half-life of the isotope shown on the graph below?
Answers:
1. Hydrogen-2 has one more neutron.
2. The number of electrons
3. Number of isotopes, mass of each isotope, and abundance of each isotope
4. Xenon-131
5. 4.5 billion years
