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Agree Learning Outcomes: Topic: P6.1.3 Nuclear Equations Spec link: P Time: 70 mins Recorded Assessment: Review: Exam questions Plenary questions Present New Knowledge: Agree Learning Outcomes: 1.All to be able to explain how Alpha and Beta Particles decay 2. To understand how equations work Apply To Demonstrate: Questions on Alpha decay Questions on Beta Decay Problem on Uranium Construct Meaning:

As you enter the room…. https://phet.colorado.edu/sims/html/build-an-atom/latest/build-an-atom_en.html House points to whoever gets the highest score before the lesson starts!

Title: Nuclear Equations Learning Objective: Complete equations for alpha, beta and gamma decay

Alpha Decay

Alpha Radiation

23290 Th 42 He + ??Ra 21684 Po ? + 21282 Pb Practice…... 228 and 88 are the missing numbers A helium nucleus is missing

23290 Th 42 He + 22888Ra 21684 Po 42 He + 21282 Pb Practice…... 228 and 88 are the missing numbers A helium nucleus is missing

Beta Decay

Practice 146 C 0 –1 e + ?? N 24194 Pu ? + 24195 Am 14 and 7 are the missing numbers An electron (Beta) is missing from number 2

146 C 0 –1 e + 147 N 24194 Pu 0 –1 e + 24195 Am Practice 14 and 7 are the missing numbers An electron (Beta) is missing from number 2

No change in mass number or atomic number

Clue: write out all three equations in full A nuclear problem... If I start with 23892U and it undergoes alpha decay, followed by 2 Beta decays what element will I end up with? Clue: write out all three equations in full

Final element has 92 protons 23892U 42He + 23490X 23490X 0–1e + 23491Y 23491Y 0–1e + 23492Z Final element has 92 protons so it must be Uranium, U-234

Worksheet Have a go at the worksheet and complete the missing elements/values. You will need a periodic table

Plenary - choose Alpha/Beta or Gamma Which has the largest mass? Alpha

Which has zero electric charge Gamma

Which travels at the speed of light? Gamma

Which is a high speed electron? Beta

Which causes the most ionisation Alpha

Which consists of 2 protons and 2 neutrons? Alpha

Which is emitted when a neutron changes into a proton? Beta

Which is the most penetrating? Gamma