study tool

123456789
Across
  1. 1. the smallest particle of an element
  2. 4. negatively charged particles that orbit the nucleus
  3. 6. particles found in the nucleus with no charge
  4. 8. matter with fixed shape and volume
  5. 9. matter with fixed volume but not shape
Down
  1. 2. anything that takes up physical space
  2. 3. two or more atoms bonded together
  3. 4. a substance that cannot be broken down into another substance
  4. 5. positively charged particles found in the nucleus
  5. 6. the center of an atom that contains protons and neutrons
  6. 7. matter with no fixed shape or volume