Across
- 4. Creator of the most recent atomic model.
- 6. An element with a different number of neutrons
- 7. The first scientist to discover the Nucleus.
- 9. An element with an atomic number of 8.
- 11. The number of protons in an element.
- 13. Each horizontal row of the periodic table.
- 15. Creator of the plum pudding model
Down
- 1. The average amounts of protons and neutrons in an element
- 2. The first person to discover atoms, though was discredited by Aristotle.
- 3. An atom with no electrical charge.
- 5. Meaning "indivisible"
- 8. An negatively charged atom.
- 10. All of the vertical columns on the periodic table.
- 12. A positively charged atom
- 14. An electrically charged element with a varying number of electrons