Download - 5.26 Chem LL - wildsci-msr.weebly.com
CHEMISTRY
Almost there….
◦ May 31st – No School Memorial Day
◦ June 15th – Remove your temporary zero
◦ Science Check In Calls w Ms. R - No Appointments
Needed - just call me at 541-604-8522
◦ If you have a specific reason for needing it to be
scheduled – you can webmail me to ask for a time
◦ June 15th – Deadline for portfolio/lab and test reworks
for Ms R’s classes
◦ June 17th – Last Day to turn in lessons – 9pm PST cut off
– all other work will become a zero
Unit 5
Lots of vocab –Take notes and read quiz and test questions carefully!
Fission vs Fusion◦ process in which a heavy nucleus is
split into two large fragments of comparable mass to form more stable and smaller nuclei, resulting in the release of great amounts of energy
◦ process in which lighter atomic nuclei combine to form a more stable, heavier nucleus, resulting in the release of great amounts of energy
Fusion Fission
Nuclear Energy◦ How is current nuclear energy created: Fission or Fusion???
◦ Fission (rx =
◦ The sun/stars and power plants powered by Fission
How it works
Nuclear Radiation Exposure
Analyze…
◦ What radiation is blocked by the skin but the most dangerous if it is absorbed internally?
◦ alpha radiation – don’t eat or drink anything exposed to alpha particles!!
◦ When are you at risk of exposure to gamma radiation?
◦ When undergoing medical procedures – remember gamma rays produced by multiple types of radioactive decay and when working with charged particles
Nuclear Radiation Units◦ Common vs SI
◦ Emission measurement - describes amount of materials released into environment
◦ Absorbed Dose - describes the amount of energy deposited per unit mass of human tissue during exposure
◦ Dose Equivalent – measures the biological risk of exposure to radiation
rem = rad x Q ◦ Simply means the risk is much greater for humans when exposed to certain types of radiation
◦ Alpha particles, fission fragments, or heavy ions 20x more dangerous
◦ higher energy level particle = higher level of danger