Atomic Structure, Periodic Table, and Bohr Models

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Across
  1. 3. a positively charged subatomic particle
  2. 4. the amount of matter that an object is made up of
  3. 6. anything that has mass and takes up space
  4. 10. a subatomic particle that has no charge
  5. 12. this element has 3 protons
  6. 16. the outside part of the atom where the electrons are located
  7. 17. tells us the number of protons that an atom contains
  8. 19. a small particle that makes up an atom
  9. 20. the "building block" of all matter
  10. 22. this element has the symbol N
Down
  1. 1. a table of the chemical elements arranged by atomic number
  2. 2. a pure substance that is made up of only one type of atom
  3. 5. the measure of the force of gravity on an object
  4. 7. one or two letters that represent an element
  5. 8. a negatively charged subatomic particle
  6. 9. the study of matter and how it changes
  7. 11. this element has atomic number 8
  8. 13. mass to calculate this, add the number of protons plus the number of neutrons
  9. 14. the central part of the atom where neutrons and protons are located
  10. 15. this element has the symbol Fe
  11. 18. a visual representation of the number of protons, neutrons, and electrons in an atom
  12. 21. this element has 28 protons in its atomic nucleus