Nuclear Processes

Week 1412/1 12/5Atomic RadiationTUESDAY 12/2 Retakes AFTER SCHOOL and during lunch Thursday or after schoolWHOT:Objective: Mathematically model how Alpha and Beta nuclear reactions.

Responsibilities: Alphas Betas and Gammas WS due Thursday.

Nuclear ReactionsAlpha DecayCompositionAlpha particle = Helium Nucleus (2 protons & 2 neutrons)Charge2+Mass (amu)4 amuShieldingBiological DamageBeta DecayCompositionBeta particle = ElectronCharge1-Mass (amu)0 amuShieldingBiological DamagePositron DecayCompositionPositron(think of it as a positive electron that lives in the nucleus)Charge1+Mass (amu)0 amuShieldingAl-foil, glass, plasticBiological DamageIngested/Inhaled, some externalGamma DecayCompositionElectromagnetic Radiation(energy)Charge0Mass (amu)0 amuShieldingBiological DamageWHOT QCreate a question and answer about alpha or beta decayWednesday 12/3 Retakes AFTER SCHOOL and during lunch Thursday or after schoolWHOT:Objective: Summarize the 3 types of nuclear radiation and their effects on us.

Responsibilities: 10.1 questions and Alphas Betas and Gammas WS due Thursday!(also no quiz Friday)

Todays AssignmentGreen Book pg 292-297.Cornell notes (2 column notes). Answer questions 1-7 on pg 297 on separate sheet of paper.

Key Vocab!!!Main IdeaWHOT QCreate a question and answer about how radiation effects you.

Challenge If you were very keen in your reading, use the word ionization in your whot QWHOT: Thursday 12/4 Quiz retakes Today during lunch or after school. Tomorrow Last day.

Objective: Model how radioactive elements decay over time.

Responsibilities: 10.1 Green Book questions due Tomorrow by the end of the day...Vocab: Half Life.

Lab today: Absolute DatingHalf-life The time it takes for half of a radioactive sample to decay.

Step 1: Use pennies to simulate half lives.Step 2: Get graph paper and rubric. Tape into journals.Step 3: Graph and conclusion questions.

Experimental vs. TheoreticalExperimental- its what we record

Theoretical- Its what we predict based on a mathematical model or well supported idea.WHOT QCreate a question and answer about Half-life.

Not the game.Radiation ProcessPhysical & Mathematical RepresentationAlpha DecayAluminum-24 will undergo alpha-decayAn alpha particle is emitted from the nucleus of the parent isotopeThe remaining atom is the daughter isotope+ 2 charge taken from Al nucleusCharge of new nucleus is 2 less than AlThis is the atomic #;Identifies element4 amu taken from Al nucleusMass of new nucleus is 4 amu less than AlAlpha Decay PracticeMore alpha-decay PracticeBeta DecayCarbon - 14 will undergo beta-decayA beta particle is emitted from the nucleus of the parent isotopeA neutron converts to a proton, and remaining atom is the daughter isotopeBeta Decay PracticeMore beta-decay PracticePositron DecayCarbon - 11 will undergo beta-decayA positron is emitted from the nucleus of the parent isotopeA proton converts to a neutron in the nucleus, and the remaining atom is the daughter isotopePositron Decay PracticeMore positron-decay Practice