Chemistry Study guides

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Across
  1. 5. is a reaction that occurs in which a layer of metal is bound to the surface of another substance with is usually another metal
  2. 6. contains protons and electrons
  3. 7. matter can be changed from one form into another mixture
  4. 9. Elements in rows
  5. 11. subtract the atomic number from the mass
  6. 13. the same number of protons and electrons
  7. 14. Russian chemist and inventor
  8. 15. the change the reactant made
  9. 16. Element is a column
  10. 17. energy is released in the form of heat hot
  11. 18. the substance that made the change
  12. 19. when one or more atoms of any element combine
  13. 22. properties opposite those of the metal
  14. 24. that they can be easily hammered into very small sheets
  15. 25. positively charged center of the atom incredibly high density
  16. 26. element that forms positive ions and has metallic bonds
Down
  1. 1. the mass of an atomic particle sub atomic particles or molecule
  2. 2. regions of space outside the nucleus of an atom where an electron may exist
  3. 3. is a code for a element
  4. 4. particles found in the nucleus of atom and carry a positive charge
  5. 8. outer most layer
  6. 10. particles that move around th nucleus of an atom and carry negative charge
  7. 12. energy is absorbed cold
  8. 20. when at least two atoms of different elements combine
  9. 21. group of gasses with similar properties
  10. 23. a pure substance that has only one kind of atom in it