Atoms Crossword Puzzle

1234567891011121314151617181920212223
Across
  1. 2. A particle with no charge
  2. 7. Measure of the amount of matter in a object
  3. 8. Mass in grams of one mole of a substance
  4. 10. Electrons in the outermost shell
  5. 13. The ability to produce a change in the composition of matter
  6. 14. Reactivity, toxicity, flammability, heat of combusion, etc.
  7. 15. Mass per unit volume of a substance
  8. 16. A particle with a negative charge
  9. 20. Theory that all matter is made up of tiny indivisible particles (atoms)
  10. 21. The nucleus of an atom splits into two or more smaller nuclei
  11. 22. A particle with a positive charge
  12. 23. An arrangement of chemical elements based on the periodic law
Down
  1. 1. 6.023x10^23
  2. 3. Number of protons or electrons found in an element of a given chemical element
  3. 4. The mass of a single atom of chemical element
  4. 5. Property of matter or energy that can be measured
  5. 6. Multiple nuclei join together to form a heavier nucleus
  6. 9. The basic unit of a chemical element
  7. 11. Outside part of an atom around the atomic nucleus
  8. 12. A way scientists convert units of measurement
  9. 17. An atom or group of atoms that carries a positive or negative electric charge
  10. 18. A fundamental interaction of nature
  11. 19. Atoms that have the same number of protons and electrons but different number of neutrons