Atoms: Ionizing Radiation, Part 1, V2 Newest Version

This film briefly considers the nature of atoms as an introduction to an educational unit on the health effects of ionizing radiation (radioactivity). Educational concepts include atoms, nucleus, proton, neutron, electron, element, isotope, electrical charges, and ions. This instructional film is from Kansas State University's web-based course, GENAG 711, Occupational and Agricultural Health. Copyright 2011, Mitch Ricketts. An illustrated transcript is available at: http://www.ksre.ksu.edu/agsafe/p.aspx...

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[sabulba57]

2:38 Why does Hydrogen have both a Proton and a Neutron, when it's atomic mass is 1.008, meaning only 1 subatomic particle in the nucleus? Wouldn't it be displayed with only a proton?

[genag711ksu]

Great question. The identity of an "element" depends on the humber of protons. All hydrogen atoms have one proton. However, atoms of the same element may have differing numbers of neutrons. The number of neutrons determines the "isotope" of the atom. At 0:40, there is an image of H-1, the most common form of hydrogen. It has no neutrons. At 2:40. there is an image of H-2. It has 1 neutron. H-3 (not shown) has 2 neturons. These are different isotopes, but they all belong to the element hydrogen.