Title:range of alpha and Beta particles in air Prior learning –Properties of alpha beta gamma –Penetration power through paper, aluminum,Lead Key words –Geiger muller counter, Stop clock, penetration Topic – Physics 2a Monday 8 th February

Alpha, Beta, Gamma Radiation Complete practical activity safely to produce accurate data Design suitable table to record results and discuss findings Draw diagrams to and write equations to show alpha beta and gamma decay By the end of thi lesson we should be able to: Topic – Physics 2a s

Task 1: Match the symbol α ß γ High energy electron formed when a neutron changes into a proton and an electron 2 protons 2 neutrons 2+ charge Wave of EM radiation, highly penetrating Topic – Physics 2a

Recap Alpha deay Alpha decay 2 protons 2neutrons (helium particle) 238 U  234 Th + 4 α + energy Topic – Physics 2a

Recap – Beta decay Beta (ß) 14C  14N + 0 ß + V+ energy Beta particles are electrons originating from the NUCLEUS of a radioactive atom. This occurs when an excess neutron changes into a proton and an electron whilst ejecting an antineutrino particle (uncharged/massless) Topic – Physics 2a 6 7

Recap – Gamma decay Gamma rays (light/EM radiation) no mass, uncharged Usually released after alpha or beta decay (γ) 131 I  131 Xe + 0 e + γ Topic – Physics 2a 5354

Thin mica Thin aluminium stops beta Thick lead reduces gamma Skin or paper stops alpha    Task 2: Draw and explain Topic – Physics 2a

Task 1: Experiment 6.2 pg 60 STAWA Copy background Aim Method (use lab notes) Diagram of set up Table for results Hmk = complete post lab discussion 1-5 in lab book Topic – Physics 2a

Summary Task Read summary 5.2 Answer 5.2 questions 3,4,5 Topic – Physics 2a

Alpha, Beta, Gamma Radiation Complete practical activity safely to produce accurate data Design suitable table to record results and discuss findings Draw diagrams to and write equations to show alpha beta and gamma decay By the end of this lesson we should be able to: Topic – Physics 2a