Chapter 25, Problem 10PS

Interpretation Introduction

Interpretation:

The stable isotope at the end, when ${{}^{\text{235}}}_{\text{92}}\text{U}$ 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.