Across
- 2. Outermost electrons on outer most orbital
- 3. Believed matter was made up of elements
- 7. Rutherford’s model of the atom
- 11. Set up an experiment which proved small particles exist
- 13. Chemical symbol is Hg
- 14. Coined the name atom which means cannot be divided
- 17. Chemical symbol is Na
- 19. 1st orbital can hold this many electrons:
- 21. Found in nucleus, has positive charge, and same same as neutron
- 23. Ideas lacked evidence evidence
- 24. Chemical symbol is Au
- 25. Organized elements by atomic number and this is the modern periodic table
- 26. 8 electrons for 2nd or 3rd orbital but only 2 electrons in 1st orbital
Down
- 1. Found in nucleus, has no charge, and same size as proton
- 4. Found out electrons travel on orbitals
- 5. Set up experiment with gold and alpha particles that proved positive parts of atom exist
- 6. Proved atoms exist and contain particles that are negatively charged
- 8. Discovered the neutron
- 9. Studied chemical bonding and created structures that show Valence electrons
- 10. Are Rows and corresponds to number of orbitals
- 12. Are Columns and Elements share same properties
- 15. 1st scientist to organize elements into Periodic Table by atomic mass
- 16. Chemical symbol is Cu
- 18. Believed atoms cannot be divided into smaller parts and created Billiard Ball model
- 20. Negatively charged, tiny, and travels on orbitals
- 22. Chemical symbol is O