Across
- 5. Student of thompson, Used Alpha beam (+) discovered the nucleus and the proton.
- 6. used different wavelengths of lightwaves to discover the presence of neutrons & electrons travel Specific distances from the nucleus
- 9. the sum of the masses of the protons neutrons and electrons
- 10. Law of ____ proportions- When 2 or more combinations of the same elements are possible, they still form Whole number ratios. (the smaller the ratio is the more double bonds there are)
- 13. Crookes - invented the cathode ray tube. (the cathode ray tube was a technology used to discover the parts of an atom.)
- 15. measurement from crest to trough Controls Color & visibility
- 19. the number of protons in the atom
- 20. Cathode ray bent when exposed to a negative charge. He discovered the election theorized that must have positive charge holding it together. Plum pudding model
- 21. neutral particle in the nucleus
- 22. electrons the outer shell electrons that are involved with chemical reactions
- 24. he developed a model discovered that electrons can Change orbitals. (He discovered that when energy is put into an atom he would see sparks.
Down
- 1. negative particle in or it around the nucleus
- 2. presents s as both a wave and a particle.
- 3. Matter is made of pieces so tiny they cannot be cut into smaller pieces.
- 4. has the same mass as a proton +1amu)
- 5. barely have any mass ( .0018 amu)
- 7. particles are the particles that make up an atom
- 8. cloud the place in the atom where we can expect to find an electron
- 11. unit that is = to the mass of 1 proton
- 12. how close the crests are or how many Crest per distance
- 14. lor more electrons from I atom to the other the atoms are now Charged & stick to each other ion-any charged atom
- 16. is the wave length center to crest of trough
- 17. positive particle in the nucleus
- 18. 4 point atomic theory (17005)
- 23. state-lowest energy level that is open/available