Physical Science - Atomic Structure

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Across
  1. 2. Created first periodic table by atomic mass.
  2. 3. Number Number of protons in an atom.
  3. 7. Force Pull between nucleus and electrons.
  4. 11. Atom is a positive sphere with embedded electrons.
  5. 13. Dense center with protons and neutrons.
  6. 14. Notation Symbol with mass number (¹²C).
  7. 15. Negative particle outside the nucleus.
  8. 16. Electrons move in clouds, not fixed orbits.
  9. 20. Force (e⁻) Push between electrons.
  10. 22. Discovered atomic number; reorganized periodic table.
  11. 23. Electrons orbit nucleus in fixed paths.
Down
  1. 1. First to name the atom.
  2. 4. Atoms are solid spheres; can’t be divided.
  3. 5. Same element, different neutrons.
  4. 6. Number Total of protons and neutrons.
  5. 8. Neutral particle in the nucleus.
  6. 9. Atomic Mass Weighted average of isotopes.
  7. 10. Atom has dense nucleus with electrons around it.
  8. 12. Force (p⁺) Push between protons in nucleus.
  9. 17. Notation Element name and mass number (Carbon-12).
  10. 18. Symbol Abbreviation for an element.
  11. 19. Cloud Space around nucleus with electrons.
  12. 21. Positive particle in the nucleus.