Fichas
Radioactivity
Fichas del conjunto (10)
- 1The French scientist ______________is credited with the discovery of radioactivity.Henri Becquerel
- 2the process by which an unstable nucleus gives off nuclear radiation is called _________.Radioactivity
- 3Marie Curie, discovered 2 new radioactive elements , name themradium and polonium.
- 4Penetrating poweralpha< beta < gamma (very large)
- 5Ionising poweralpha( max ) > beta > gamma(min)
- 6Stopping substancealpha< beta < gamma (very large)
- 7– to detect the suspected brain tumours and blood clots before they become dangerous.Tracers
- 8they detect suspected brain tumours and blood clots.Radio-sodium, radio-iron, radio-iodine are called tracers
- 9Carbon datingCarbon dating – the age of the excavated materials of archaeological importance ,rocks and hence of buried plants is estimate by the study of rate of decay of carbon -14 by emissions in the remains of dead plants
- 10MEDICAL USESGamma radiation from cobalt-60 are used to treat cancer cells .
Leukemia, cancer are cured by radiotherpy.
Radio-sodium, radio-iron, radio-iodine are called tracers, they detect suspected brain tumours and blood clots.
Radio-cardiology
GAMMA RAYS are used to sterlize bandages, dressings, syringes and other equipment.