Across
- 1. _________ bonds; when electrons are transferred and ions form
- 4. revolutionized chemistry with his hypothesis using atomic theory (last name)
- 7. atoms of the same element but differ in mass
- 8. proposed the "plum pudding" model of atoms (last name)
- 13. ____________ bonds; when electrons are "shared" and molecule form
- 18. positively charged, subatomic particles found in nucleus
- 19. negatively charged atoms; formed when atom gains 1+ electrons
- 20. demonstrated that all pure compounds contain the same elements in the same proportion by mass (last name)
- 22. negatively charged, subatomic particle; coined in 1891 by George Stoney
- 23. compounds that contain hydrogen, oxygen, and one other element; replace -ate with ic and -it with ous
- 26. the "staircase" on the periodic table that separte metals and nonmetals
- 27. elements arranged in 18 vertical columns on the periodic table
Down
- 2. collection of rules for naming things
- 3. term word derivied from Greek word "indivisible"
- 5. particles are attracted by __________ charges
- 6. _____________ compounds: result when atoms share, rather than gaining or losing electrons
- 9. positively charged; produced by radioactive decay of radium
- 10. ____________ are formed when 2+ elements chemically combine = formation of bonds
- 11. positively charged atoms; formed when atom loses 1+ electron
- 12. ionic coumpounds that contaim water molecules as integral components of their crystals
- 14. ____________ and Meyer noticed periodic relationships among properties of the elements
- 15. a hydrogen and one other nonmetallic element: hydro_______ic
- 16. particles are repelled by ___________ charges
- 17. uncharged, subatomic particles with same amout of mass as of a proton
- 21. polyatomic ions that contain 1+oxygen atoms
- 24. compounds with the same chemical formula but differet molecular structures
- 25. elements arranged in seven horizontal rows on periodic table