Chemistry Crossword

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Across
  1. 2. Positively charged, massive, located in the nucleus
  2. 3. Tells us how many atoms of each element are in a molecule.
  3. 5. Occur when two or more DIFFERENT types of atoms combine together to form molecules.
Down
  1. 1. Located on the left side of the periodic table.
  2. 2. After the change the mass always has to be the same.
  3. 4. On the periodic table they have similar properties