Mia's Chemistry Crossword puzzle

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Across
  1. 1. A pure substance made out from many of the same atoms
  2. 3. Anything that takes up space
  3. 5. Positively charged particles of an atom
  4. 7. Something with a defined volume
  5. 8. An amount of matter with no defined shape
  6. 11. The mass of a chemical shown as a decimal point, located at the bottom
  7. 13. The amount of space an object takes up
  8. 14. Negatively charged particles of an atom
Down
  1. 2. Neutral particles of an atom
  2. 4. In the top, it shows the number of protons in a element
  3. 6. something without a defined mass or volume
  4. 9. matter in its smallest form
  5. 10. The atomic mass after it's rounded
  6. 12. Something with a defined mass