SC 130 Physical Science quiz 10 • Name:

1. __________________ What is the atomic number for Nitrogen?
2. __________________ How many protons does Nitrogen have?
3. __________________ How many electrons does Nitrogen have?
4. __________________ What is the atomic weight of Nitrogen?
5. __________________ Is Nitrogen a diatomic molecule?
6. __________________ How many electrons does Nitrogen have in the outer valence shell?
7. __________________ How many more electrons does Nitrogen need in order to have a full "octet" of eight electrons in its outer shell?
8. __________________ Given the above, how many hydrogens are likely to bond with Nitrogen? Remember, each hydrogen can contribute one electron to the Nitrogen.
9. __________________ Is vinegar an acid or a base?
10. __________________ Is ammonia an acid or a base?
11. When added to flower pigments, acids and bases had different effects on the different flowers. There were, however some overall patterns to the changes. What were the color changes generally produced by the addition of an acid?
12. What were the color changes generally produced by the addition of an base?
13. What is the difference between an element and a molecule?
14. Draw a diagram of an H₂O water molecule showing the atoms and electrons for the two hydrogen atoms and the single oxygen atom. Beneficial hint: Oxygen has a 1s orbital, a 2s orbital, and uses two of the three possible 2p orbitals.