Questions on Atomic Species

1. What feature of an atom determines its species?
2. Explain the reason "why" for your answer in the above question.
3. Are there any atomic elements with no protons? With no neutrons? With no electrons?
4. What is an ion?
5. How does an ion behave differently from an atom?
6. Are there negative ions? Positive? Give examples of each.
7. What is an isotope?
8. What is the element number 13 in the table of elements? What is number 56?
9. What is the lightest element? What is the heaviest?
10. What is the difference between an atom and a molecule?
11. Discuss the different types of kinetic energy possible for a molecule.  Be specific for the case of the oxygen O₂ molecule.