9th Edition
Steven S. Zumdahl
ISBN: 9781133611097




9th Edition
Steven S. Zumdahl
ISBN: 9781133611097
Textbook Problem

There are four stable isotopes of iron with mass numbers 54, 56, 57, and 58. There are also two radioactive isotopes: iron-53 and iruo-59. Predict modes of decay for these two isotopes. (Sec Table 19.2.)

Interpretation Introduction


The mode of decay of two radio isotopes – Iron- 53 and Iron- 59 has to be predicted.

Concept Introduction:

Radioactive decay is a phenomenon of emission of energy from unstable isotope in the form of radiation or sub-particles of the isotope.  There are many types of radioactive decay they are – alpha decay, neutron emission, positron decay, electron capture etc.


Iron- 53 has more number of protons.  Positron is positively charged and thus it emits positive charge by positron decay.  As it is deficient of electrons, it captures electrons. It produces 53Mn as daughter isotope. It is represented as,

F2653e β+ M2553n

Iron- 59 is electron rich and so it undergoes beta particle decay

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