Atoms and Elements

2. the greek philosipher who came up with the name for an "atom"
3. good conductors and malleable
10. an atom of the same element with a different number of neutrons
12. the amount of matter contained in an atom
14. the center of an atom which contains the protons and neutrons of that atom
15. Oxygen, Carbon, Flourine
16. a chart containing all known elements and their proporties
17. who discovered the nucleus
19. what was fired at and bounced off of the nuclei during the "gold foil experament"
21. negativly charged subatomic partical

1. what was used during the "gold foil experament"
4. a model of the atom that we use today
5. the amount of protons contained in one atom
6. positivly charged subatomic partical
7. the ability of an atom to attract it's self to another atom's electron pair in a chemical bond
8. who thought atoms were composed of wind, earth, fire, and water
9. a subatomic partical with a nurtral charge
11. the name for particals that make up and atom
13. who discovered electrons
18. a pure substance made up of one type of atom
20. the smallest unit of matter