AGENDA CLASSICS

Date: 3-18 Topic: Ch4.4

Glen Chem.

Table of Contents

OverviewObjectiveWarm-upStandard

ESLRNotes

ClassworkHomework

DispatchSummary

Objective

…relationship between unstable nuclei / radioactive decay.

…alpha, beta, and gamma radiation in terms of mass and charge.

ESLR

1. EffectiveCommunicators

Notes

Title: Radioactivity

Classwork

Ch 4 handout to tomorrow

ch 4 half-sheet due tomorrow

Homework

Ch 4 Handout Due tomorrow

Standard

11c. … some naturally occurring isotopes of elements are radioactive, as are isotopes formed in nuclear reactions.

11d. … the three most common forms of radioactive decay (alpha, beta, and gamma) and know how the nucleus changes in each type of decay.

Overview

Radiation protection technicians use radiation measuring instruments to locate /assess the risk posed by contaminated materials. Then they decontaminate the area with high-pressure cleaning equipment and remove the radioactive materials.

Warm-up

How would you go about removing

radioactive material?

Dispatch

23290Th ---> 228

88Ra + 42a

Name the three elementsThorium, radium, alpha

Notes

A. Unstable atoms gain stability by losing energy.They loose energy by emitting radiation“Radioactive decay”

Notes

B. Alpha radiation contains 2 protons and 2 neutronsamu=4 charge +2

Notes

C. Beta decayAn atom gives off an electron amu= 1/1840 charge -1

Notes

D. Gamma decayA photon is given off no mass and no charge

Notes

E. Neutron to proton ratio must be balanced for a chemical equationMass number and atomic number

Notes

F. …Radioactive atoms undergo enough radioactive decay to reach a stable form of the atom.

Notes

G.