Std 3 intro lab – fill in information on the paper

Name_________________________________________________________Period ____________ Date: ____________________

Exploration of Different Types of NUCLEAR DECAY

BACKGROUND: Radioactive decay, also known as nuclear decay or radioactivity, is the process by which the nucleus of an unstable atom loses energy by emitting radiation. This radiation is released either through the release of alpha particles, beta particles, gamma rays, and conversion electrons (positrons). The various types of decays are named after these particles: alpha decay, beta decay, gamma decay, and positron decay.

PLEASE COMPLETE BEFORE YOU BEGIN—Decide on group roles

1. Team Leader: ____________________________________________________

2. Data Collector: _________________________________________________

3. Spokesperson/Timekeeper: ________________________________________

Procedure: Visit each station and perform the following.

1. Read the “text information” provided for each station below.

2. Perform the procedure as indicated.

3. Make careful observations for each type of decay.

4. Write a claim as well as the evidence used to support that claim which explains each nuclear decay.

5. Create a question using the question wheel (each section, you should create a different type of question).

NOTE: DO NOT USE KNOWLEDGE OR COMPREHENSION QUESTIONS.

Definition of claim and evidence

Example sentence starters

Claim: A statement of what is true or believed to be true

It was determined that _________________

Example using example above: It was determined that a balanced reaction has the same type and number of atoms on both sides of the arrow.

Evidence: Facts obtained from an experiment that relate to and support the claim

The evidence that supports this claim is____________

Example: The evidence that supports this claim is there is 1 Na and 1 Cl on both sides of the equation.

Station #1: Alpha Decay

Purpose

Procedure

· To determine how the reactant and product is different in an alpha decay

· To balance an alpha decay reaction

· To write a balanced alpha decay reaction

· To predict product of an alpha decay reaction

1. Read the information provided in the folder

2. Study the chemical reaction

3. Fill in the observations

4. Write a claim of how the reactants are different from the products

5. Write evidence supporting your claim

Observations:

Claim

Evidence

I see/I notice that…

· Mass Numbers:

· Atomic Numbers:

· Reactants & Products:

It was determined that in an alpha decay…

· # of protons of isotope change by

· # of neutrons change by

The evidence that supports this claim is…

Balance Decay Reaction: Fill in the blank in each of the following decay reactions with the correct decay particle or decayed nucleus that will balance the decay reaction.

Write Decay Reaction: Write the balanced decay reaction formula when each of the following radioactive isotopes decays in the manner stated.

What is the name of the product isotope formed when Radon-222 decays by alpha decay?

Predict Product: Figure out the isotope formed by filling in the rest of the reaction.

Real-Life Application of Alpha Decay:

Question about Station #1:

Station #2: Beta Decay

Purpose

Procedure

· To determine how the reactant and product is different in a beta decay

· To balance a beta decay reaction

· To write a balanced beta decay reaction

· To predict product of a beta decay reaction

1. Read the information provided in the folder

2. Study the chemical reaction

3. Fill in the observations

4. Write a claim of how the reactants are different from the products

5. Write evidence supporting your claim

Observations:

Claim

Evidence

I see/I notice that…

· Mass Numbers:

· Atomic Numbers:

· Reactants & Products:

It was determined that in a beta decay…

· # of protons of isotope change by

· # of neutrons change by

The evidence that supports this claim is…

Balance Decay Reaction: Fill in the blank in each of the following decay reactions with the correct decay particle or decayed nucleus that will balance the decay reaction.

Write Decay Reaction: Write the balanced decay reaction formula when each of the following radioactive isotopes decays in the manner stated.

What is the name of the product isotope formed when Thorium-234 decays by beta decay?

Predict Product: Figure out the isotope formed by filling in the rest of the reaction.

Real-Life Application of Beta Decay:

Question about Station #2:

Station #3: Positron Decay

Purpose

Procedure

· To determine how the reactant and product is different in a positron decay

· To balance a positron decay reaction

· To write a balanced positron decay reaction

· To predict product of a positron decay reaction

1. Read the information provided in the folder

2. Study the chemical reaction

3. Fill in the observations

4. Write a claim of how the reactants are different from the products

5. Write evidence supporting your claim

Observations:

Claim

Evidence

I see/I notice that…

· Mass Numbers:

· Atomic Numbers:

· Reactants & Products:

It was determined that in an alpha decay…

· # of protons of isotope change by

· # of neutrons change by

The evidence that supports this claim is…

Balance Decay Reaction: Fill in the blank in each of the following decay reactions with the correct decay particle or decayed nucleus that will balance the decay reaction.

Write Decay Reaction: Write the balanced decay reaction formula when each of the following radioactive isotopes decays in the manner stated.

What is the name of the product isotope formed when Oxygen-15 decays by gamma decay?

Predict Product: Figure out the isotope formed by filling in the rest of the reaction.

Real-Life Application of Positron Decay:

Question about Station #3:

Summary of Inquiry Activity

Alpha Decay

Beta Decay

Positron Decay

Symbol of Particle

# of protons

# of neutrons

Atomic #

Decreases by 2

Mass #

NOTE: For each section, state if it “Increases by” or “Decreases by”

Group work reflection:

Checklist:

· Did each person play a part in the activity?

· Was everyone on task?

· Were all parts of the activity completed?

· Was group workspace cleaned up?

Answer the following questions:

What worked well the most during the activity for the group?

What did not work so well during the activity for the group? Where did you disagree as a group or saw mistakes in each other’s work?

What will you do next time to improve how your group worked together?

How much did you as an individual participate in the group?

What can you do next time to improve your own performance in the lab group?

Group Rubric:

Poor

1 point

Developing

2 points

Good

3 points

Excellent

4 points

Group Rating

(YOU RATE)

Teacher

Rating

Contribution

One or more members do not contribute.

All members contribute, but some contribute more than others.

All members contribute equally.

All members contribute equally, and some even contribute more than was required.

Cooperation

Teacher intervention needed often to help group cooperate.

Members work well together some of the time. Some teacher intervention needed.

Members work well together most of the time.

All members work well together all of the time; assist others when needed.

On task

Team needs frequent teacher reminders to get on task.

Team is on task some of the time. Needs teacher reminders.

Team is on task most of the time. Does not need any teacher reminders.

Team is on task all of the time.

Does not need any teacher reminders.

Communication

Members need frequent teacher intervention to listen to each other and speak to each other appropriately.

Members need some teacher intervention to be able to listen to each other and speak to each other appropriately.

All members listen to each other and speak to each other in equal amounts.

Each member listens well to other members. Each member speaks in friendly and encouraging tones.

Mastery of Content

I am unable to distinguish among various nuclear decays modes. I am unable to balance, write, and predict reactions.

I will be able to somewhat distinguish among various nuclear decays modes. I will be able to balance, write, and predict some reactions.

I will be able to mostly distinguish among various nuclear decays modes. I will be able to balance, write, and predict most reactions.

I will be able to completely distinguish among various nuclear decays modes. I will be able to balance, write, and predict all reactions.

Total Score: /32

/16

/16