Radiation & Radioactivity. In preparation for the Radioactivity iLab on iLabCentral.org Created by: Northwestern University, Office of STEM Education Partnerships
In preparation for the Radioactivity iLab
Created by: Northwestern University, Office of STEM Education Partnerships
Some information was provided by the United States Environmental Protection Agency, U.S. Dept. of Labor Occupational Safety & Health Administration, Radiation Answers, and the Non-Destructive Testing Resource Center.
Radiation is the emission of energy from a source that travels in the form of either:
2) high-speed particles
Yes there are different types of radiation, which can generally broken down into two categorizations:
Electromagnetic vs. Particle radiation
Ionizing vs. Non-ionizing radiationAre there different types of radiation?
Radiation in the form of high-speed particlesis called particle radiation.
Ionizing radiationhas enough energy to break chemical bonds in molecules, or remove tightly bound electrons from atoms, which creates charged molecules or atoms (ions).
Credit: Canadian Nuclear Association
Radioactivity is the spontaneous emission of energy from an unstable nucleus of an atom by radiation, in the form of particles or rays.
Radioactivity is measured by a Geiger counter, which measures ionizing radiation by counting the number of particles or rays (photons) it detects.
http://www.geigercounters.com/Geiger.wavHow is radioactivity measured?
Strontium (Sr) is a silvery metal, and turns yellow quickly when exposed to air.
Credit: eHowWhat is strontium-90?
Credit: Ricarose Roque