Question

The International Atomic Energy Agency (IAEA) has an interactive chart of the nuclides which has a wealth of information. Use the chart to answer the questions below - this link should open the chart in a new window or tab Interactive chart of the nuclides (from the IAEA) In your new window or tab, you should sce a colorful diagram that is shaped something like an amoeba. Note that you can click-and-drag in the window to re-position the graph, and you can move and zoom using the controls at the top left (you can also zoom by scrolling up or down in the window) (a) Most of the nuclides shown are given a color, representing the half-life, but some of the nuclides are black. Note that, near the bottom left of the chart, the black ones are found on or near the line Z = N (same number of protons and neutrons). As the atomic number increases, however, the nuclides in black are found below the Z N line, so these black ones have more neutrons than protons. What do the nuclides in black O These are nuclei that decay via electron capture. These are nuclides we have no information about. These are stable nuclei. These are nuclei that decay via alpha decay O These are nuclei that have extremely short half-lives These are the nuclides that play the bad nuclei in the movies. O These are nuclei that decay by giving off a gamma ray These are nuclei that decay via the beta-minus process. These are nuclei that decay via the beta-plus process. (b) To the right of the chart, you should see a "Color zones by" sclector with a pull-down menu. Use that pull-down menu to select "main decay mode". Note which nuclides decay via alpha decay, beta-minus decay beta-plus decay, etc. In general, what is true about those nuclides which decay via the beta-minus process? They are found above the most stable nuclei, so that decaying via beta-minus moves the nuclei toward the zone of higher stability They do not change their number of protons when they decay ? They are found above the most stable nuclei, so that decaying via beta-minus moves the nuclei away from the zone of higher stability They do not change their number of neutrons when they decay They have long half-lives. They are found below the most stable nuclei, so that decaying via beta-minus moves the nuclei toward the zone of higher stability They are found below the most stable nuclel, so that decaying via beta-minus moves the nuclel away from the zone of higher stability They have short half-lives (c) According to the table, the element tin has how many stable nuclides? (This is more than any other element, in fact.) stable nuclides

Answer 1

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Ch nuele pire co. IO 118 112 115 1g0 r84