Chapter 20, Problem 9E

Which of the following nuclei lie within the band of stability shown In Figure 20.2?

(a) chlorine-37
(b) calcium-40
(c) ${}^{\text{204}}\text{Bi}$

(d) ${}^{\text{56}}\text{Fe}$

(e) ${}^{\text{206}}\text{Pb}$

(f) ${}^{\text{211}}\text{Pb}$

(g) ${}^{\text{222}}\text{Rn}$

(h) carbon-14

Figure 20.2 This plot shows the nuclides that are known to exist and those are stable. The stable nuclides are indicated in blue, and the unstable nuclides are indicated in green. Note that all isotopes of elements with atomic numbers greater than 83 are unstable. The solid line is the line where n=z.