Across
- 1. Group 18 elements are called _______ gasses
- 5. The physicist who discovered the nucleus
- 6. The number of protons in Boron
- 9. The category of elements contained on the left side of the periodic table
- 10. The number of neutrons in a typical Flourine atom
- 11. The positively charged center of an atom
- 14. A repeating pattern
- 17. Particles that make up protons and neutrons
- 19. The particle which determines what element it is
- 20. The most common form for metals
- 21. An element with very similar properties to Neon
Down
- 1. The only particle in an atom without charge
- 2. The mass number (atomic mass) of an atom containing 6 protons and 7 neutrons
- 3. If an atom was the size of a stadium, the nucleus would be the size of a
- 4. The type of element between metal and non-metal
- 7. The element in the 5th period & the 13th group
- 8. The number of quarks which have been found
- 12. The most common form for non-metals besides gas
- 13. Horizontal row on the periodic table
- 15. Most of an atom is made up of _______ space
- 16. Where the electrons are located in an atom
- 18. The model of the atom that says electrons travel in fixed orbits
- 22. Vertical column on the periodic table