Chapter 11, Problem 94CE

Interpretation Introduction

Interpretation:

The volume of sodium and potassium ion has to be calculated.  The number of sodium atoms that fits in the volume occupied by a potassium atom has to be identified.

Concept Introduction:

Atomic radii:

The atomic radius of an atom can be defined as the distance between the center of the nucleus and the outermost electron.  In the periodic table, across a period atomic radius decreases and atomic radius increases down the group. For isoelectronic species, the atomic radii increase with decrease of charge on the element.

The volume of a sphere with radius r is calculated by the equation,

  $V=\text{}\frac{4}{3}\pi r^3$