Compounds and mixture

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Across
  1. 6. Anything that has mass and takes up space
  2. 7. 2 hydrogen atoms bonded with oxygen
  3. 10. Allow made by iron and carbon
  4. 14. Elements combined that are not chemically bonded
  5. 16. A yellow powder which is yellow and not hard
  6. 17. Electrically neutral particles
  7. 18. 2 nitrogen atoms bonded
  8. 20. Any change to the physical properties of matter
  9. 22. Total amount of known elements
  10. 23. Rows in the periodic table
  11. 24. Joined together
Down
  1. 1. Alloy made from mixing copper and tin
  2. 2. How many elements were made in the laboratory?
  3. 3. Tiny particle, cannot be divided
  4. 4. Any change to the physical properties of matter
  5. 5. Elements combined that are chemically bonded
  6. 8. Mixtures of metal
  7. 9. One type of atoms bonded together
  8. 11. The first person to make the periodic table
  9. 12. Atoms with electrical charge
  10. 13. Columns in a periodic table
  11. 15. The center of an atom
  12. 19. Negatively charged particles
  13. 20. Positively charged particles
  14. 21. In the periodic table, there are ... metals