20 Hard Questions

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Across
  1. 3. What element is 1s^2 2s^2 2p^6
  2. 5. The lowest energy state of an atom is what state?
  3. 6. The most common type of hydrogen atoms is sometimes called this.
  4. 8. A particle of electromagnetic radiation having zero rest mass and carrying a quantum of energy.
  5. 11. Si unit of temperature.
  6. 12. Elements such as Boron, Silicon, Germanium, Arsenic, Antimony, and Tellurium.
  7. 13. _______ development typically involves the production and use of products that improve our quality of life.
  8. 15. Research that generally carried out to solve a problem.
  9. 18. Properties depend on the amount of matter that is present.
  10. 20. What is the atomic number of Carbon.
Down
  1. 1. Every substance, whether it is an element or a compound, has ________ properties.
  2. 2. The minimum quantity of energy that can be lost or gained by an atom.
  3. 4. What element is [Ar]3d^6 4s^2.
  4. 7. Chance _______ can be the result of basic research.
  5. 9. Mixtures are uniform in composition.
  6. 10. All matter can be classified into one of two groups: pure substances or _________.
  7. 14. What element is [Ar]3d^10 4s^2.
  8. 16. Used in party balloons because it is less dense than air.
  9. 17. Between 400nm and 700nm is the what spectrum.
  10. 19. A broad generalization that explains a body of facts or phenomena.