Across
- 4. The ingredient in gasoline that determines the grade of gasoline you buy at the gas station.
- 8. Unit of mass in the metric system.
- 9. The charge that the valence electrons "feel" due to the number of protons in the nucleus and the number of electrons in the inner shells of the atom.
- 10. A counting unit that tells you how many atoms or molecules you have in a given situation.
- 13. A type of chemical reaction in which energy is released to the environment.
Down
- 1. Prefix for 1000 in the metric system.
- 2. Term used to describe the size (or radius) of an atom.
- 3. A type of chemical reaction in which energy is absorbed from the environment.
- 5. Unit of energy in the metric system.
- 6. The type of electrons that are either shared or transferred in all chemical reactions.
- 7. The process in which inner electrons shield outer electrons from the positive charge of the atom's nucleus.
- 11. The gas/element that makes up rocket fuel.
- 12. The total energy (or heat H) of a system (or chemical reaction).