Across
- 4. positively charged particles within an atom
- 8. this rule requires the outer shell to be full
- 11. as temperature increases, kinetic energy _____
- 12. everything is made up of these
- 13. easily transfers thermal energy
- 15. process of gaining or losing an electron to become more stable
- 20. has 67 protons
- 21. slows down the transfer thermal energy
- 22. found in the nucleus of atom, but has no charge
Down
- 1. before the arrow in a chem. equation/reaction
- 2. after the arrow in a chem. equation/reaction
- 3. type of atomic model that includes the atomic nucleus and all electron shells
- 5. represented by Na on the periodic table
- 6. represented by C on the periodic table
- 7. cannot be seen with the naked eye
- 9. outermost shell and electrons
- 10. maximum number of electrons in the first electron shell
- 12. negatively charged ion that gained at least one electron
- 13. type of change that results in new molecules or atoms
- 14. positively charged ion that lost at least one electron
- 16. charge of an atom with equal number of protons and electrons
- 17. how many valence electrons does oxygen have?
- 18. on a graph, dependent variables are found here
- 19. the sum of protons and neutrons in an atom (bottom number in block)