Science Unit 3/4 Crossword

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Across
  1. 2. This part of the atom is negatively charged.
  2. 3. In order to be considered matter, the substance has mass and ________________.
  3. 6. The center of the atom is called the __________.
  4. 7. The atomic number of a periodic square tells you how many ___________ there are in the atom.
Down
  1. 1. All matter can be broken down into this small, basic building block.
  2. 4. This is the 8th element of the periodic table.
  3. 5. This element has the atomic symbol "Ne."