Matter

123456789
Across
  1. 4. elements with similar properties grouped together
  2. 7. where all the elements that mankind has discovered are organized in
  3. 8. two or more elements chemically combined
  4. 9. the up and down rows in the Periodic table
Down
  1. 1. the pure substance of one type of atom
  2. 2. molecules in an atom that have a negative charge
  3. 3. the left to right rows in the Periodic Table
  4. 5. - anything that has mass and takes up space
  5. 6. molecules in an atom that have a neutral charge
  6. 7. molecules in an atom that have a negative charge