1 / 10

Happy Thursday!!

Happy Thursday!!. Test Tomorrow!! 5 grams of Selenium-83 decays to .15625 in 25 hours. What is the half-life of Selenium-83? The half-life of strontium-90 is 35 years. If 7.0 grams of strontium-90 is produced, how much will remain after 140 years?. Chemistry. Unit Two Day 6 Kimrey

ryu
Download Presentation

Happy Thursday!!

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. Happy Thursday!! • Test Tomorrow!! • 5 grams of Selenium-83 decays to .15625 in 25 hours. What is the half-life of Selenium-83? • The half-life of strontium-90 is 35 years. If 7.0 grams of strontium-90 is produced, how much will remain after 140 years?

  2. Chemistry Unit Two Day 6 Kimrey 13 September 2012

  3. Half-Life Lab Quiz • What is the half-life of Pennium, according to your graph? • What was the average count for shake #3? • Which unit could refer to a half-life? • Meter • Second • Liter • Kilogram

  4. If Carbon-12 accounts for 98.92% of a sample, and Carbon-14 is 0.022%, find the % of Carbon-13 in the sample.

  5. This element undergoes beta and gamma decay. Write the equation: • La-138

  6. Magnesium has three naturally occuring isotopes. 78.70% of Magnesium atoms exist as Magnesium-24, 10.03% exist as Magnesium-25 and 11.17% exist as Magnesium-26. What is the average atomic mass of Magnesium?

  7. Fission versus Fusion • Fusion: small atoms coming together to make a bigger atom • occurs on the sun; very hot temperatures • Atoms “fuse” together • Fission: breaking a large atom into smaller atoms (called daughter nuclei) • Natural radioactive decay

  8. This element undergoes alpha and gamma decay. Write the equation: • U-238

  9. Thallium-201 has a half-life of 73 hours. If 4.0 mg of thallium-201 disintegrates over a period of 6.0 days and 2 hours, how many mg of thallium-201 will remain?

  10. Element Math…

More Related