Understanding Fajans Rule: Ion Depletion & Valency Change

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SUMMARY

The discussion centers on Fajans' Rule, specifically how ion depletion affects valency changes during radioactive decay. After alpha emission, the valency of the remaining product is 2, while beta emission results in a valency increase of 1. The key takeaway is that altering the nuclear composition through radioactive decay directly influences the electronic composition, leading to changes in valency. Understanding these relationships is crucial for grasping the implications of Fajans' Rule in nuclear chemistry.

PREREQUISITES
  • Fajans' Rule in chemistry
  • Radioactive decay processes (alpha and beta emissions)
  • Basic atomic structure (protons, neutrons, electrons)
  • Ionic valency concepts
NEXT STEPS
  • Study the implications of Fajans' Rule on ionic compounds
  • Explore the mechanisms of alpha and beta decay in detail
  • Investigate the relationship between nuclear composition and electronic configuration
  • Learn about the effects of ionization on chemical reactivity
USEFUL FOR

Chemistry students, educators, and professionals interested in nuclear chemistry and the behavior of ions during radioactive decay.

loza17
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fajans rule??

hey can anyone help me with fajans rule?

after the emission of alpha rays from a radioactive substance the product remaining has a valency of 2. after the emission of beta rays it has a valency increase of 1. so the ionic depletion changes the valency.

thus meaning reducing the ions changes the valency

is this right?
 
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What does this have to do with Fajan's rules?

In any case, the important thing to keep in mind is that it is harder to change the nuclear composition (number of protons and neutrons) than the electronic composition. Once the number of protons is changed, the resulting ion will attract or throw away the necessary number of electrons to stay neutral. So, if the atom gains/loses n protons through radioactive decay, it will then pick up/throw out n electrons as well.

With this in mind, make sure you can follow what is happening with the atom above. What would have been the valency before alpha emission? Do the subsequent changes in valency make sense?
 
thats what my tutor taught me and i was confused about it. thanks for the help =]
 

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