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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

The uranium-235 radioactive decay series includes 7 alpha emissions and 4 beta emissions. Identify the stable isotope at the end of this series.

Interpretation Introduction

Interpretation:

The stable isotope at the end, when 23592U radioactive decay undergoes 7alpha emissions and 4 beta emissions has to be identified.

Concept introduction:

Alpha particle:

  • Alpha rays (or) Alpha particles are the positively charged particles.
  • A highly energetic helium nucleus which contains two protons and two neutrons is called the alpha particle.
  • Mass of an alpha particle is 4 times the mass of a proton or Hydrogen nucleus and is equal to that of helium nucleus.

Beta particle:

  • Beta particles are highly energetic electrons.
  • They are negatively charged and have a negligible mass.
  • The mass of a Beta particle is equal to the mass of an electron.
Explanation

The stable isotope in uranium-235 radioactive decay series is lead-207 by 7 alpha emission and 4 beta particle emission is shown below,

(23592Uα90231Thβ91231Paα89227Acβ22790Thα88223Ra

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