Unit 2 Science 8

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Across
  1. 2. total number of protons and neutrons in an atom
  2. 5. area around the nucleus in an atom that houses the electrons
  3. 7. negatively charged subatomic particle
  4. 8. _______ of Mass:the principle that in any closed system, mass cannot be created or destroyed, it can only be changed from one form to another
  5. 9. basic building block to chemistry
  6. 10. center of an atom that houses the neutrons and protons
Down
  1. 1. a neutral subatomic particle in the nucleus
  2. 3. number on the periodic table that is the same as the number of protons
  3. 4. positively charged subatomic particle in the nucleus
  4. 6. a table of the chemical elements arranged in order of atomic number