Chemistry Vocabulary

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Across
  1. 2. number of protons in the nucleus of an atom
  2. 8. when two atoms have same number of protons but different numbers of neutrons
  3. 10. located outside of the nucleus
  4. 11. A column on the periodic table
  5. 13. made by physically combining materials
  6. 16. the elements or compounds at the beginning of a reaction
  7. 18. a type of mixture that is uniform throughout
  8. 20. basic unit of matter when all atoms have the same number of protons
  9. 21. when protons and electrons are unequal
Down
  1. 1. all matter can be classified as a mixture or a...
  2. 2. subatomic particle that has no charge
  3. 3. the elements or compounds at the end of a reaction
  4. 4. A type of mixture that is not uniform throughout
  5. 5. An organizational chart of the elements
  6. 6. Two or more elements chemically combined
  7. 7. a row on the periodic table
  8. 9. an atoms ability to attract electrons in a chemical bond
  9. 12. positively charged particle inside the nucleus
  10. 13. anything that takes up space and has mass
  11. 14. ray a nuclear particle with no mass or charge
  12. 15. smallest unit of matter
  13. 17. the amount of mass in a a certain amount of space
  14. 19. the number of protons plus neutrons