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3. How can elements change through radioactivity?
3.1 Define ‘isotope’ and ‘radioisotope’ and give examples.
3.2 Explain that natural radioactivity arises from the decay of nuclei in atoms, releasing particles and energy.
3.3 Identify examples of the medical and industrial use of nuclear energy.
3.3b *Extension: Assess examples of the medical and industrial uses of nuclear energy.
TASK 3.0
TASK 3.0
Literacy Task: 9 MG 3.0 Marie Curie Reading Activity TF.docx
Where was Marie born and when did she die?
What were her greatest scientific accomplishments?
What were her greatest recognitions? What disappointments?
Write three facts about her life.
Other than her work on radioactivity, what else did she achieve?
What information do you gain about her personality or character?
9 MG 3.1a Marie Curie Reading Activity TF.docx3.1 Define ‘isotope’ and ‘radioisotope’ and give examples.
Task 3.1a
a) Watch the video(s).
What are Isotopes https://www.youtube.com/watch?v=faB9Gb7bl9I [3.53 mins]
What is an Isotope? https://www.youtube.com/watch?v=JRzT9_CNwl8 [1.54 mins]
What are Isotopes? https://www.youtube.com/watch?v=xjY5p-1CDr8 [2.52 mins]
TASK 3.1b
TASK 3.1b
Isotopes and radioactivity:
Complete Phet Interactive: Isotopes and Atomic Mass https://phet.colorado.edu/sims/html/isotopes-and-atomic-mass/latest/isotopes-and-atomic-mass_en.html
Complete worksheet 9 MG 3.1b Phet Istotopes WS
9 MG 3.1a Phet Isotopes WS.docx9 MG 3.1b Phet Istotopes WS
Practical 3.1c Calculating Isotopic Masses
Background Information:
A new element has been discovered and named Yummium, Ym. The atomic number is xxxx.
You have samples of three isotopes of Ym.
Q1. Are these samples the same substance?
Q2. What is different about them?
Each group will record the masses of the isotopes. Several groups will give us multiple readings which should lead us to reliability - remember, reliability is NOT just three readings. It is at least three consecutive readings within the range of measurement error.
Equipment:
Chocolate bars of three different sizes (eg Mars Bars - mini, fun size, regular.)
Gloves
Safety Glasses
Electronic Scale (clean paper towel over)
Procedure:
Put on glasses, gloves.
Record your group number given by the teacher.
Place the smallest size Yummium on the scale.
Read the mass (g) from the scale and write it on the table on the board.
Repeat for the other two sizes.
Results:
Calculate the class average for each isotope, round to the nearest whole number and record in the Class Average row.
Subtract the given atomic number from the class average mass of each isotope.
to find the number of neutrons for each isotope. Write those numbers on the board.
Write the symbol for each isotope with atomic number and atomic mass.
Discussion:
Use TSAR VIC to discuss and evaluate the experimental modelling.
9 MG 3.1c Istotopes Practical Results Table
Task 3.1d Review
Task 3.1d Review
1. Write a definition for:
'isotope' and give examples of two isotopes of one element.
'radioisotope' and give an example.
3.2 Explain that natural radioactivity arises from the decay of nuclei in atoms, releasing particles and energy.
I'M UP TO HERE
I'M UP TO HERE
Review Notes: 10.2 WCR 1.3 Atoms and Isotopes Review Notes.pdf
Worksheet: 10.2 WCR 1.3 Isotopes WS TF.pdf
PPT and Digital Notebook: Isotopes Digital NB PPT.pptx and 10.2 WCR 1.3 Isotopes Digital NB with Model TF.pdf
Activity: Isotopes Lesson for Task Cards TF.pdf and 10.2 WCR 1.3 Isotope Task Cards see Lesson TF.pdf
Worksheet: Identifying Isotopes Mod TF.pdf
Worksheet: Identifying Isotopes TF.docx
Task 3.2a
Task 3.2a
Complete Radioactivity Worksheet
Practical 3.2b Half-life and radioactive decay: https://www.riskassess.com.au/risk_assessment/9370039?previous_url=%2Fhome
Put the heading Half-Life and under it create a table in your book with two columns of headings: Trial, # disks removed.
Take the disks and place them all facing the same way in the box.
Shake the box.
Remove the disks that have turned over. Count them and record the number in a table of Trial vs Number of Decayed "Atoms" .
Repeat Steps 3 and 4 without replacing any disks until the box has one or no disks.
Graph results using Trial vs Number of Decayed "Atoms".
3.2 Explain that natural radioactivity arises from the decay of nuclei in atoms, releasing particles and energy.
TASK 3.2B
TASK 3.2B
1. Write a definition for half-life', sketch a quick diagram of an example
Parent atoms are the unstable starting atoms. Daughter atoms are the atoms the parents decay to form. The red line is a decay graph.
TASK 3.2C
TASK 3.2C
1. Create a table with column headings:
radiation name
made of
penetrates through
and row headings (in Column 1 under the column heading radiation name):
alpha particles
beta particles
gamma rays
2. Research to very briefly (a few words in bullet point) fill in the other two columns (the diagram below might help for the third column).
3.3 Identify examples of the medical and industrial use of nuclear energy.
Task 3.3
Task 3.3
Research: write 4 sentences for each in dot-point style:
Research the medical use of a diagnostic radioisotope (e.g. technetium-99 e.g. https://www.world-nuclear.org/information-library/non-power-nuclear-applications/radioisotopes-research/radioisotopes-in-medicine.aspx)
Research the industrial use of a radioisotope (e.g. a radio-tracer (e.g. Strontium-90) e.g. https://www.world-nuclear.org/information-library/non-power-nuclear-applications/radioisotopes-research/radioisotopes-in-industry.aspx#:~:text=Radioisotopes%20are%20used%20by%20manufacturers,and%20corrosion%20of%20process%20equipment.&text=Radiotracers%20are%20also%20used%20in,the%20extent%20of%20oil%20fields)
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