brief history of radioactivity
TRANSCRIPT
![Page 1: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/1.jpg)
Radioactivity
![Page 2: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/2.jpg)
Radioactivity• Unstable nucleus spontaneously emits small
particles and/or energy in order to attain a more stable nuclear state.
![Page 3: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/3.jpg)
1895 – Wilhelm Roentgen
• Nobel Prize in physics in 1901
![Page 4: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/4.jpg)
1896 – Henri Becquerel
• Discovered Radioactivity• Phosphorescence
o Uranium salts
• Nobel Prize in 1903
![Page 5: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/5.jpg)
1898 – Marie and Pierre Curie
• First Radioactive elementso Radium and Polonium
• Poloniumo Half-life
Uraninite
![Page 6: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/6.jpg)
Half-life
![Page 7: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/7.jpg)
1899/1900 Alpha, Beta, Gamma
![Page 8: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/8.jpg)
What is “radioactivity”?
• Emissions o Not affected by temperatureo Could change color of glass o Burn skino Create heat
• Rutherford and Soddy (1908)o TRANSMUTATION of one element to another
• The atom is not an indestructible unit!
![Page 9: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/9.jpg)
Types of Radiation• Non-ionizing (low energy)
o Low frequency
• Ionizing (high energy)o High frequency
• Activity!o Label where you think non-ionizing and ionizing radiation are in
the spectrumo categorize
![Page 10: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/10.jpg)
ionizingNon-ionizing
![Page 11: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/11.jpg)
Nuclear Reactions
![Page 12: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/12.jpg)
Nuclear Reactors
![Page 13: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/13.jpg)
![Page 14: Brief History of Radioactivity](https://reader034.vdocuments.us/reader034/viewer/2022052523/556430e2d8b42ad3308b4731/html5/thumbnails/14.jpg)
Importance