Atomic crossword puzzle-Nathan McDuffie

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Across
  1. 2. Building blocks that make up matter
  2. 4. Russian chemist who made the periodic table
  3. 5. dense region of a atom consisting of protons and neutrons
  4. 8. a state of matter that has no fixed shape or volume
  5. 12. the number of protons in a atom
  6. 13. physicist who made foundational contributions to understanding atomic structure
  7. 14. a subatomic particle with a positive charge
  8. 16. a substance composed of identical molecules composed of atoms from more than 1 element
  9. 17. a substance consisting of only atoms of the same properties
  10. 18. a subatomic particle with a negative charge
Down
  1. 1. one of the basic states of matter where molecules are closely packed together
  2. 3. the are around the nucleus where electrons are most likely to be found
  3. 4. the amount of matter in a object
  4. 6. a table of chemical elements
  5. 7. a subatomic particle with no charge
  6. 9. the mass of a atom
  7. 10. a group of atoms bonded together
  8. 11. a state of matter that takes the shape of its container but retains a constant volume
  9. 15. how much space a object takes up in relation to the amount of matter