Chapter 25, Problem 36A

Interpretation Introduction

Interpretation: The below-given equation for the decay of Lead to Bismuth needs to be completed with atomic number and mass number:

Concept Introduction: The process in which a nucleus of an unstable atom emits particles of radiation is called radioactivity.

Answer to Problem 36A

  $\text{P}\text{b}\to \text{B}\text{i}+e$

Explanation of Solution

Given Information: Decay of Lead (Pb) − 210 produces an isotope of the element Bismuth (Bi) by emission of a beta particle.

In beta decay of Lead (Pb) − 210, a neutron transforms into a proton, and the atomic number for the atom increases from 82 to 83 while the mass number remains the same. The reaction also emits beta particles from the nucleus.

Complete equation for the reaction is

  $\text{P}\text{b}\to \text{B}\text{i}+e$