Chapter 21, Problem 82E

Interpretation Introduction

Interpretation:

‘ Number of alpha emission and amount of radiation in Ci’ should be identified.

Concept introduction:

Polonium is disintegrated and emitting alpha particles. Therefore, the disintegrated mass can be calculated by subtracting the mass left of Po from initial mass of Po as following.

m₀ − m

And thus, by multiplying the disintegrated mass with the Avogadro’s number of 218 g of Po, the number of emission can be determined.

Given:

${\text{T}}_{1/2}$ = 3 min

t = 25 min