Across
- 1. subatomic particle without a charge
- 5. atoms of the same element with different masses
- 8. center of an atom
- 11. the number unique to each element on the periodic table, tells you protons
- 13. color of light with large wavelength
- 18. color of light with small wavelength
- 19. atom with a charge
- 20. charge of an anion
- 21. electrons involved in bonding (outer electrons)
- 22. total number of protons and neutrons
- 24. negatively charged subatomic particle
- 25. he used the gold foil experiment to find that atoms were mostly empty space
- 26. number of neutrons in an atom with 9 protons and a mass of 16
- 27. letters for the elements on the periodic table
Down
- 2. type of radiation with low energy
- 3. average atomic mass of naturally occurring isotopes
- 4. mass number of an atom with 7protons, 7 electrons, and 8 neutrons
- 6. positively charged subatomic particle
- 7. charge of a cation
- 9. if the protons and electrons are uneven, you have this
- 10. type of radiation with high energy
- 12. atomic number of fluorine
- 14. 1-7, notated by the period numbers
- 15. smallest form of matter that retains the properties of an element
- 16. substances that make up the periodic table
- 17. not negative or positive
- 23. his atomic model showed electrons on rings around the nucleus