Chapter 18, Problem 26AE

Interpretation Introduction

Interpretation:

Percent of mass of neutrons and electrons in $\text{R}\text{a}$ have to be calculated.

Concept Introduction:

Number of protons is determined by the atomic number $\left(\text{Z}\right)$. To maintain neutrality of a nucleus number of protons and number electrons will be same. Number of neutrons is determined by difference in number of protons and total mass number.

The nuclide symbol of an atom is represented as follows:

  $\text{X}$

Here,

$\text{Z}$ is an atomic number.

$\text{A}$ is mass number.

$\text{X}$ is isotope of any element.