1. Radiation (EST) and Rutherford

2. Remember the visible spectrum?

3. The electromagnetic spectrum

4. The electromagnetic spectrum
Heinrich Hertz James Clerk Maxwell

5. The electromagnetic spectrum
Wilhelm Röntgen

6. Electromagnetic trend
The shorter the wavelength, the more energy the wave has.

7. What Is radiation?
This is when an atom gives off high energy particles (matter) or waves.
Henri Becquerel, Marie Sklodowska Curie and Pierre Curie were among the first scientists to experiment with radiation.

8. Ernest Rutherford

9. 3 types of radiation

10. Blocking radiation

11. Complete page 28 of your workbook.

12. I bombarded gold foil with alpha (+) particles.
Ernest Rutherford
Radioactive substances can give off alpha (+), beta (-) and gamma (neutral) radiation.
I bombarded gold foil with alpha (+) particles. !
Ernest Rutherford, 1911

14. Gold Foil Experiment

15. Atoms are mostly empty space.
2 conclusions
Atoms are mostly empty space.
An atom contains a very dense and small nucleus. The nucleus is positively charged.

17. If this soccer ball were the nucleus of an atom, how far away would the nearest electron be?

20. Atoms are mostly empty space.
What can we conclude from this?
Atoms are mostly empty space.