Give an example showing that gamma radiation has more penetrating power than alpha radiation
Key Knowledge - LCWC
Question 7
7.
How is the nature of radioactive decay described?
Question 8
8.
What is the half-life of a radioactive isotope?
Question 9
9.
What happens to the half-life of a particular isotope as more and more nuclei decay?
Question 10
10.
How is the nature of radioactive decay described?
Question 11
11.
What is the half-life of a radioactive isotope?
Question 12
12.
What happens to the half-life of a particular isotope as more and more nuclei decay?
Recall Quiz
Question 13
13.
Question 14
14.
Question 15
15.
3) How does the half-life for a particular isotope change over time?
I Do
Question 16
16.
I do: Use the graph to calculate the half life - we will do this together as part of the lesson.
We Do
Question 17
17.
We do: Use the graph to calculate the half life - we will do this together as part of the lesson.
You Do
Question 18
18.
You do: 1. Use the graph to calculate the half life
Question 19
19.
You do: 2. Use the graph to calculate the half life
2nd I Do
Question 20
20.
I do: Use the table to calculate the half life - we will do this together as part of the lesson
2nd We Do
Question 21
21.
We do: Use the table to calculate the half life - we will do this together as part of the lesson
2nd You Do
Question 22
22.
You do: Use the table to calculate the half life
3rd I Do
Question 23
23.
I do: Calculate the half life of an isotope if its activity falls from 8000 counts per second to 500 counts per second after 10 minutes - we will do this together in class
3rd We Do
Question 24
24.
We do: Calculate the half-life of an isotope if its activity falls from 120 counts per minute to 30 counts per minute after 20 hours - we will do this together in class
3rd You Do
Question 25
25.
You do: 1. Calculate the half-life of an isotope if its activity falls from 6000 counts per second to 750 counts per second after 6 hours
Question 26
26.
You do:2. What is half-life of a 500g radioactive sample that decays to 62.5g is 24 hours?
Plenary
Question 27
27.
Question 28
28.
2.Sketch a graph showing radioactive decay
What happens to the mass number when an alpha particle is released?
Mass number decreases by 4
Mass number increases by 4
What happens to the atomic number when an alpha particle is released?
Atomic number decreases by 2
Atomic number increases by 2
What happens to the atomic number and the mass number when a beta particle is released?
Mass number stays the same, atomic number stays the same
Mass number increases by 1, atomic number stays the same
Mass number stays the same, atomic number increases by 1
Define the dependent variable
The variable you keep the same
The variable you measure
The variable you change
Give this number to 3 significant figures: 3.7365
3.7300
3.73
3.74
1)Give two definitions of the half life of a radioactive isotope
The time it takes for the number of nuclei in a sample to half
The time it takes for half the sample to disappear
The time it takes for the count rate from a sample to half
The time it takes for the atom to shrink by half
2)What two words are used to describe the nature of radioactive decay?
Random
Predictable
Unpredictable
Certain
A pattern
1)Give two definitions of the half life of a radioactive isotope
The time it takes for the number of nuclei in a sample to half
The time it takes for the atom to shrink by half
The time it takes for the count rate from a sample to half
The time it takes for half the sample to disappear