Science Challenge It! Crossword

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Across
  1. 1. Anything that has mass or takes up space.
  2. 4. Any time a metal is mixed with one other element.
  3. 6. Table An organized system of elements based on their properties.
  4. 8. Elements physically mixed together not chemically bonded together.
Down
  1. 2. Building blocks
  2. 3. Atoms of the same type together.
  3. 5. Whenever a group of atoms is held together by chemical bonds.
  4. 7. Elements chemically bonded together.