Log inSign up for FREE
Library

Half Life OALH

Last updated almost 5 years ago
28 questions
Do Now
1

What happens to the mass number when an alpha particle is released?

1

What happens to the atomic number when an alpha particle is released?

1

What happens to the atomic number and the mass number when a beta particle is released?

1

Define the dependent variable

1

Give this number to 3 significant figures: 3.7365

1

Give an example showing that gamma radiation has more penetrating power than alpha radiation

Key Knowledge - LCWC
1

How is the nature of radioactive decay described?

1

What is the half-life of a radioactive isotope?

1

What happens to the half-life of a particular isotope as more and more nuclei decay?

1

How is the nature of radioactive decay described?

1

What is the half-life of a radioactive isotope?

1

What happens to the half-life of a particular isotope as more and more nuclei decay?

Recall Quiz
1

1)Give two definitions of the half life of a radioactive isotope

1

2)What two words are used to describe the nature of radioactive decay?

1

3) How does the half-life for a particular isotope change over time?

I Do
1

I do: Use the graph to calculate the half life - we will do this together as part of the lesson.

We Do
1

We do: Use the graph to calculate the half life - we will do this together as part of the lesson.

You Do
1

You do: 1. Use the graph to calculate the half life

1

You do: 2. Use the graph to calculate the half life

2nd I Do
1

I do: Use the table to calculate the half life - we will do this together as part of the lesson

2nd We Do
1

We do: Use the table to calculate the half life - we will do this together as part of the lesson

2nd You Do
1

You do: Use the table to calculate the half life

3rd I Do
1

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
1

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
1

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

1

You do: 2. What is half-life of a 500g radioactive sample that decays to 62.5g is 24 hours?

Plenary
1

1)Give two definitions of the half life of a radioactive isotope

1

2.Sketch a graph showing radioactive decay