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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Marie and Pierre Curie isolated radium and polonium from uranium ore (pitchblende, which contains 238U and 235U. Which of the following isotopes of radium and polonium can be found in the uranium ore? (Hint: Consider both the isotope half-lives and the decay series starting with 238U and 235U.)

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Interpretation Introduction

Interpretation: The isotopes of radium and polonium which can be found in the uranium ore has to be determined.

Concept Introduction:

Isotopes: The two elements with same atomic number but with different mass number are considered as isotopes of each other.

In the radioactive decay process the unstable isotopes loses their energy by emitting radiation in order to attain stable species. It is converted in to stable isotopes by emitting positron +10β , gamma 00γ , Beta β10, alpha 24He and or by electron capture 10e .

Explanation

Pitchblende which is the ore of uranium contains uranium-238 and uranium-235. Radium and polonium can be isolated from uranium ore.

Both radium and polonium isotopes must belongs to 4n+2 or 4n+3 decay series. Also, the isotopes should have long half-lives in order to survive the isolation and separation process...

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