Across
- 4. the average mass of all of the stable isotopes
- 5. atoms with the same number of protons, but a different number of neutrons
- 6. the seventh element
- 9. this atom has an electron configuration of 2-8-7
- 10. this element has a mass number of 40
- 12. the ninth element
- 14. performed the gold foil experiment
- 15. positively charged particle
- 16. number found by adding the protons and neutrons
Down
- 1. the number related to how many protons an atom has
- 2. the symbol for this element is K
- 3. non-charged particle
- 7. negatively charged particle
- 8. location of the protons and neutrons in an atom
- 9. the arrangement of electrons in an atom
- 11. this element has a density of 2.00 g/cm3 (Table S)
- 13. location of the electrons in an atom