Chemistry Extra Credit

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Across
  1. 3. a part or aspect of something abstract, especially one that is essential or characteristic
  2. 5. group 2 on periodic table
  3. 9. positively charged ion
  4. 11. the basic unit of a chemical element.
  5. 12. group 17 on periodic table
  6. 13. and car}bon dioxide
  7. 16. A chemical bond formed when two atoms share two
  8. 17. a thing that is composed of two or more separate elements; a mixture.
  9. 19. group 18 on periodic table
Down
  1. 1. neutral subatomic particle
  2. 2. group 1 on periodic table
  3. 4. able to be hammered or pressed permanently out of shape without breaking or cracking.
  4. 6. forms of the same element that contain equal numbers of protons but different numbers of neutrons
  5. 7. negative subatomic particle
  6. 8. A bond between atoms or ions that allows molecules to form
  7. 10. positive subatomic particle
  8. 11. negatively charged ion
  9. 14. dissolved in water
  10. 15. When a compound combines with oxygen gas to form water,
  11. 18. all of the atoms (or ions) are arranged in a regular grid pattern