The following problems are taken from T. L. Brown, H. E. Lemay, B. E. Bursten, & J. R. Burdge, Chemistry: The Central Science, Ninth Edition, Chapter 21. To see the solution to a problem or to return from the solution, click on the number of the problem.
12) Each of the following nuclei undergoes either beta or positron emission. Predict the type of emission for each:
16) In each of the following pairs, which nuclide would you expect to be the more abundant in nature and justify your choices:
(a) 11548Cd or 11248Cd
(b) 3013Al or 2713Al
(c) palladium-106 or palladium-113
(d) xenon-128 or cesium-128
26) Write balanced equations for:
36) Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr.
(a) How many beta particles are emitted in 45.5 s by a 2.44-mg sample of 60Co?
(b) What is the activity of the sample in Bq?
44) How much energy must be supplied to break a single 21Ne nucleus into separated protons and neutrons if the nucleus has a mass of 20.98846 amu? What is the nuclear binding energy for 1 mol of 21Ne?
76) The Sun radiates energy into space at the rate of 3.9 x 1026 J/s.
(a) Calculate the rate of mass loss from the Sun in kg/s.
(b) How does this mass loss arise?