Across
- 3. This scientist performed the Oil Drop Experiment
- 6. Negatively charged ion
- 7. Positively charged ion
- 8. This group of elements have high conductivity and are malleable
- 11. This type of radiation releases helium nuclei
- 12. Sum of the protons and electrons
- 16. This scientist came up with 5 postulates for atomic theory
- 18. Located in the nucleus with a charge of +1
- 19. This element has only 1 proton
- 20. This type of radiation is released in most nuclear reactions
- 21. First Woman to win the Nobel Prize
Down
- 1. Located in the nucleus with no charge
- 2. Located outside the nucleus with a charge of -1
- 4. This group of elements have very poor conductivity and are dull and brittle
- 5. The protons stay the same in these but the electrons vary
- 9. This type of radiation releases electrons
- 10. This scientist discovered the electron
- 13. This scientist performed the Gold Foil Experiment
- 14. Number of protons in an atom
- 15. When two or more atoms that are nonmetals combine together this is formed
- 17. This group on the periodic table includes Cl and Br