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Introduction to Radioactive Decay OALH

Last updated almost 5 years ago
33 questions
Do Now:
1

Describe what happens to the position of electrons when they absorb electromagnetic radiation.

1

How are positive ions formed?

1

What is an isotope?

1

Define repeatable.

1

Convert 400g to the correct unit.

1

Challenge: A firework appears to give off light because...

Key knowledge LCWC
1

What can make a nucleus unstable?

1

What does an unstable nucleus do in order to become more stable?

1

What is radioactive decay?

1

What is activity?

1

What are the units for activity?

1

What is the “count-rate”?

1

What is the most commonly used radioactivity detector called?

1

What can make a nucleus unstable?

1

What does an unstable nucleus do in order to become more stable?

1

What is radioactive decay?

1

What is activity?

1

What are the units for activity?

1

What is the “count-rate”?

1

What is the most commonly used radioactivity detector called?

Recall Quiz:
1

What does an unstable nucleus do to become more stable?

1

What is radioactive decay?

1

What is the “count-rate”?

1

What is “activity”?

1

What are the units for activity?

We do:
1

Plutonium-239 is an isotope of plutonium.
In a sample of Plutonium-239there are 5.11x1023 atoms. Over 2 minutes 1.35x1023 Plutonium-239nuclei have decayed.
Explain why the nuclei have decayed.

You do:
1

Carbon-14 is an isotope of carbon.
In a sample of carbon-14there are 9.78 x1023 atoms. Over 10 minutes 2.32x1023 carbon-14nuclei have decayed.
Explain why the nuclei have decayed.

Indepedent task:
1

Describe what radioactive decay is and .explain why it is said to be random and unpredictable.

Plenary:
1

What is radioactive decay described as unpredictable?

1

Define radioactive decay.

1

State the units for activity.

1

What is the count rate?

1

What types of nuclei give out radiation?