Chemistry Unit Review

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Across
  1. 3. Gasses that will not react with anything
  2. 5. The biggest part of the atom, contains protons and neutrons
  3. 6. The letters we use to show a certain element
  4. 8. The steps of the shells of atoms that electrons spin on
  5. 11. How many protons and electrons an atom has
  6. 13. Has properties of both metals and nonmetals
  7. 15. Matter cannot be create
  8. 18. What is created in a chemical reaction
  9. 19. Positively charged particle, in the nucleus of an atom
  10. 20. Negatively charged particle, makes up the shell of an atom
  11. 21. A mixture of different atoms
  12. 23. Neutral particle, in the nucleus of an atom
  13. 24. When a reaction creates energy (heat)
Down
  1. 1. Column of the periodic table
  2. 2. A group of atoms that are bonded together
  3. 4. How massive an atom is
  4. 7. An electron in the outermost shell of an atom
  5. 9. The inventor of the modern periodic table
  6. 10. When a reaction pulls in energy (cold)
  7. 12. A collection of a single type of atom
  8. 14. Dull, brittle, and non conductive
  9. 16. One particle of an element
  10. 17. Shiny, ductile, and malleable
  11. 22. Row on the periodic table
  12. 25. What is put into a chemical reaction