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Transcript of Radioactivity
What is Radioactivity?
A process by which an unstable nucleus emits one or more particles or energy in the form of electromagnetic radiation.
Scientists that discovered this idea of radioactivity!!!
Nuclear Fission and Fusion
The charged particles or energy emitted by the unstable nucleus!!!
Most massive particle
Don't travel far through matter
made of protons and neutrons
made of 1 electron
Smaller in mass
Moves faster through matter
more energy than light waves
Moves easily through matter
Marie and Pierre Curie
The # of wavelengths within a 1 second interval.
Transfer thermal energy by electromagnetic waves.
This happens in ALL directions!!
Unstable nuclei emit the alpha and beta particles.
The # of protons and neutrons change.
The parent material changes into daughter material.
The heavier nucleus changes into a lighter nucleus.
Create a half- life
Ways to detect radioactivity
NOT all radiation is harmful!!
Fission: start with a heavy nucleus end with lighter nuclei.
Fusion: start with lighter nuclei end with a heavier nucleus.
3 white papers
2 colored pencils
Risk and Benefits of Radiation
Read the handout with a partner.
Answer questions 1-5 on the last page.
Write a conclusion about what YOU think about radiation.