Across
- 2. Electrons in the outermost energy level
- 5. Symbol with dots showing valence electrons
- 9. Weighted average of isotope masses
- 11. Periodic table column number
- 14. Total number of protons and neutrons
- 15. Number of protons in an atom
- 16. Positively charged subatomic particle
- 17. Atomic model with electrons in fixed orbits
- 18. Specific allowed electron energy
- 20. Central part of an atom containing protons and neutrons
- 22. Region where an electron is likely found
- 23. Electrically neutral subatomic particle
- 25. Property of matter that can be positive or negative
- 26. Atom with a net electrical charge
Down
- 1. Chart organizing elements by atomic number
- 3. One twelfth the mass of carbon twelve
- 4. Atom with equal protons and electrons
- 6. Atomic model with central nucleus
- 7. How common an isotope is in nature
- 8. One or two letter element abbreviation
- 10. Modern model using orbitals
- 12. Arrangement of electrons in an atom
- 13. Diagram showing electrons in energy levels
- 19. Negatively charged subatomic particle
- 21. Atoms of same element with different neutrons
- 24. Energy level surrounding nucleus