Radon Exam Study Guide with Complete Solutions

Radon Exam Study Guide with Complete Solutions Nucleus of an atom - Answer️️ -Contains one or more positively charged protons and uncharged neutrons Number of protons - Answer️️ -Atomic number of an element reflects the.... Mass = - Answer️️ -Number of protons and neutrons Radon 222 (mass #) - Answer️️ -86 protons (atomic number) and 136 neutrons Ion - Answer️️ -Atom that either lost or gained electrons Radon - Answer️️ -Major source is from soil Produced by natural decay of radium Gas that moves easily through small spaces Half life 3.8 days (Gas, inert, no static electrical charge) Radium - Answer️️ -A decay product of uranium found in rock and soil - U238 -- R226 -- Rn222 Half life - Answer️️ -Half of radon in a sealed volume will decay in 3.8 days, half of the remainder in the next 3.8 days etc. Thorium 232 -- radon 220 - Answer️️ -Half life of 55 seconds, therefore is less important than radon 222 exposure ©SOPHIABENNETT EXAM SOLUTIONS_2024/2025 Tuesday, September 3, 2024 10:30 AM Page | 2 Alpha particules - Answer️️ -Polonium 218 & polonium 214 Greater health risk, damaging DNA molecules of living cells Relatively massive but low penetrating power and slow in movement Gamma Rays - Answer️️ -High penetrating power and move at speed of light Level of radioactivity - Answer️️ -Measured in curies One picoCurie - Answer️️ -1 trillionth of a curie One pCi/L - Answer️️ -2.22 disintegrations per minute/per liter of air Radon decay products (RDP) - Answer️️ -Radon decays into a series of elements and isotopes - First 4 have a short half-life (30 minutes or less) - Polonium 218 & polonium 214 - Lead 214 & Bismuth 214 Measured in working levels (particles, chemically reactive, static electrical charge, major health ris