1. Aim: How is radiation used in the real world everyday? HAPPY NEW YEAR!! Do Now: Nuclear chemistry powerpointDo Now: Nuclear chemistry powerpoint Copy notes (On my web page…go to www.johnbowne.org, click on Teachers and locate Osorio)www.johnbowne.org Agenda: Housekeeping Review books have arrived! Work is returned…place in folders. Lab count as of Jan 1 is on Pupilpath…should have 15 labs. Ask me for makeup labs…should have 18 by end of Cycle 2 (Jan 20.) Makeup labs: “Band of Stability” and “Half life.” Makeup hw and missing work Get ahead! Read “Uses of radiation.” Test Friday?!?

2. Aim: How is radiation used in the real world everyday? Half-life- time it takes for half a sample of a particular radioactive isotope to decay; the rate of nuclear decay. Half-life is a constant value and is not affected by temperature or pressure. The use of radioactive isotopes to determine the age of an object is called radioactive dating.

3. Aim: How is radiation used in the real world everyday? Essential Questions : Why do certain elements undergo radioactive decay and others don’t? How do the nuclei of atoms stay intact if protons are positive, and like charges repel? Describe the various types of radioactive decay in terms of charge, mass and “penetrating power.”