Across
- 2. Horizontal rows in periodic table
- 4. Number of protons in an atom
- 6. Discovered the electron
- 7. Elements that do not easily react
- 11. Smallest unit of matter
- 12. Table organizing elements
- 15. Neutral particle in an atom
- 16. Center of the atom
- 17. Elements created artificially in labs
- 21. Atoms of the same element bonded together (ex: O₂)
- 22. Combination of two or more atoms
- 23. Vertical columns in periodic table
- 24. Organized elements by atomic number (scientist)
- 26. Energy level around nucleus
- 27. Particles orbiting nucleus
Down
- 1. Negatively charged particle
- 3. Process of creating new elements in stars
- 4. Negatively charged ion
- 5. Protons have this type of charge
- 8. Each element has a unique _ number
- 9. Particles found in the nucleus
- 10. Tiny solid sphere model scientist (last name)
- 13. Total protons + neutrons
- 14. Positively charged particle
- 18. Smallest particle of a compound
- 19. Scientist who proposed that electrons move in orbits
- 20. Atoms with different neutron numbers
- 25. Space where electrons are found