Across
- 6. characteristic that can be determined without a chemical reaction; end up with same stuff after change
- 9. protons + neutrons in an element; larger number
- 12. neutral subatomic particle in the nucleus
- 13. graphic list of all the elements
- 14. mixture that does not settle
- 15. evenly mixed
- 17. a specific type of atom; defined by # of protons: oxygen, iron, calcium
- 18. mixture that will settle
Down
- 1. number of protons in an element; defines the element; smaller number
- 2. Characteristic that can be determined only with a chemical reaction
- 3. unevenly mixed
- 4. negatively charged subatomic particle outside the nucleus
- 5. basic building block of matter made of 3 subatomic particles-- protons, neutrons, electrons
- 7. two or more atoms chemically combined
- 8. also known as Atomic symbol; the letters; only one capital letter per element
- 10. simplest form of a substance
- 11. two or more substances physically combined; can be separated by physical methods
- 13. positively charged subatomic particle in the nucleus
- 16. center of atom
