1 / 11

Warm-Up February 14, 2013

Warm-Up February 14, 2013. Write down the date and objective. Objective: SWBAT determine the half-life of a substance by completing the Half-Life of a Twizzler activity. Complete the following warm-up: What is radioactive decay? What is the difference between beta and alpha decay? .

hateya
Download Presentation

Warm-Up February 14, 2013

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Warm-UpFebruary 14, 2013 • Write down the date and objective. • Objective: SWBAT determine the half-life of a substance by completing the Half-Life of a Twizzler activity. • Complete the following warm-up: • What is radioactive decay? • What is the difference between beta and alpha decay?

  2. Objective & Agenda • SWBAT determine the half-life of a substance by completing the Half-Life of a Twizzler activity. Agenda • Radioactivity • Twizzler Lab • Half-life • Practice Problems • Review • Exit Slip

  3. What is half-life? • Half-life is the time it takes for half of its atoms to decay into something else.

  4. Twizzler Lab • Read through the procedures. • Do not bite your Twizzler until given permission. • Make sure you only eat half at a time. • Answer the Conclusion & Analysis Questions

  5. Half-Life • The length of time it takes for one-half of the atoms of a radioactive nuclide to disintegrate.

  6. Half-Life

  7. Half-Life Example 1. Strontium-90 Has half-life of 28 years. If a 1.00-mg sample was stored for 112 years. What mass of Sr-90 would remain? 2. The half-life of isotope X is 2.0 years. How many years would it take for a 4.0 mg sample of X to decay and have only 0.50 mg of it remain?

  8. Half-Life Practice

  9. Pit Stop Review • When you finish a pit stop, shout “Pit Stop” • Everyone on your team must have that pit stop complete • I will check your work, if it is correct you can move on to the next Pit Stop • First team finishes, wins!

  10. Reminders • HW 11 Due tomorrow • Unit 2 Exam tomorrow • Honors- Reading Assignment due tomorrow

  11. Exit SlipFebruary 14, 2013 1. After 30 days, 5.0 grams of a radioactive isotope remains from an original 40 gram sample. What is the half-life of this element?

More Related