20 Hard Questions

3. What element is 1s^2 2s^2 2p^6
5. The lowest energy state of an atom is what state?
6. The most common type of hydrogen atoms is sometimes called this.
8. A particle of electromagnetic radiation having zero rest mass and carrying a quantum of energy.
11. Si unit of temperature.
12. Elements such as Boron, Silicon, Germanium, Arsenic, Antimony, and Tellurium.
13. _______ development typically involves the production and use of products that improve our quality of life.
15. Research that generally carried out to solve a problem.
18. Properties depend on the amount of matter that is present.
20. What is the atomic number of Carbon.

1. Every substance, whether it is an element or a compound, has ________ properties.
2. The minimum quantity of energy that can be lost or gained by an atom.
4. What element is [Ar]3d^6 4s^2.
7. Chance _______ can be the result of basic research.
9. Mixtures are uniform in composition.
10. All matter can be classified into one of two groups: pure substances or _________.
14. What element is [Ar]3d^10 4s^2.
16. Used in party balloons because it is less dense than air.
17. Between 400nm and 700nm is the what spectrum.
19. A broad generalization that explains a body of facts or phenomena.