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KEy question: What is atomic decay?
KEy question: What is atomic decay?
Task 1 - Why?
Task 1 - Why?
Have a look at this picture.
It shows Homer Simpson celebrating a win for his favourite football team.
The Team is called 'The isotopes'.
Why do you think the team is called that?
Task 2 - Isotopes
Task 2 - Isotopes
Look at these 2 chemical elements.
What elements are we looking at?
How many protons, neutrons and electrons do they have?
when this happens it is called an isotope
when this happens it is called an isotope
Isotopes are like a different version of the same atom. They have the same number of protons and electrons, but, they have a different number of NEUTRONS.
For example, Carbon is in position 6 of the periodic table and has 6 protons. I usually has 6 Neutrons, giving it a total mass of 12. However, there is a common isotope of Carbon that the same 6 protons, but had 8 Neutrons instead of 6. This means that it has a total mass of 14 not 12. We call this isotope Carbon-14
Task 3 -FAct find
Task 3 -FAct find
You will need to know all about each type of radiation.
Please complete the table on the companion sheet.
Ues the internet to find the information required.
It is a good idea to memorise this table.
Using this knowledge - Example
Using this knowledge - Example
One application of radioactivity is in a paper/cardboard mill. A radioactive beta source is on one side of the material and a detector on the other.
If too much radioactivity is getting through, then the material is too thin and the rollers open up a bit to make the material thicker. If not enough radioactivity is detected then the rollers compress to make the material thinner.
This method is used in the manufacture of lots of sheet materials: plastics, paper, sheet steel.
Task 4 - Know it
Task 4 - Know it
Watch the revisoin video to 'jog' your memory.
Then test your knowledge with these practise questions.
Completed slides 8 - 11 on the comapnion sheet
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