Chemistry 1.2 Radioactivity

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  • Created by: Dan
  • Created on: 26-12-13 12:24
Describe an Alpha particle.
A cluster of 2 Protons and 2 Neutrons (Helium)
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Describe a Beta particle.
Fast moving electrons
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Describe gamma rays.
High energy electromagnetic radiation
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Give the definition of half-life.
The time taken for the radioactivity of a radioisotope to fall to half its value
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How does radiation cause mutations in DNA?
High energy radioactive emissions break chemical bonds in cells
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How is Cobalt-60 used in medicine?
Cobalt-60 is used in radiotherapy to kill cancerous cells and prevent tumours
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How is Iodine-131 used in medicine?
Used to monitor iodine uptake in defective thyroid glands
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How is Potassium-40 used today?
Used to estimate the geological age of rocks
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Carbon-14 is used in carbon dating. How does carbon dating work?
Organisms absorb C-14 from the atmosphere until death. When dead the remaining C-14 begins to decay. The rate of decay decreases over the years and that which is left can be used to calculate the age of organisms
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Other cards in this set

Card 2

Front

Describe a Beta particle.

Back

Fast moving electrons

Card 3

Front

Describe gamma rays.

Back

Preview of the front of card 3

Card 4

Front

Give the definition of half-life.

Back

Preview of the front of card 4

Card 5

Front

How does radiation cause mutations in DNA?

Back

Preview of the front of card 5
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