Chapter 21, Problem 100SCQ

Interpretation Introduction

Interpretation:

To estimate the radius of lead atom.

Concept introduction:

Lead belongs to group $\text{4A}$ of the periodic table. Lead and its compounds are considered poisonous and can cause lead poisoning in individuals. The salts of lead are sweet in taste.

Lead crystallizes in fcc (face centred cubic) unit cell. The density of lead is $11.350{\text{ g/cm}}^3$. The density is expressed by the formula,

$\text{d}=\frac{\text{Z}\times \text{M}}{{\text{a}}^3\times {\text{N}}_{\text{a}}}$

Where d is the density,$Na$ is the Avogadro number, M is the mass and a is the edge length.