Chapter 2, Problem 2.34QP

Interpretation Introduction

Interpretation:

Number of protons and electrons in given ions has to be determined.

Concept Introduction:

An ion is an individual atom or group of atoms has net positive charge or negative charge.  Positively charged atom remains the same during chemical reaction (or change), however negatively charged atom may accept or donate an electrons.  The loss of electrons result in cation.

Mass number (A): Mass number of an element is sum of protons and neutrons of the atom.

$\text{A= Number of protons}\left(\text{P}\right)\text{ + Number of neutrons}\left(\text{n}\right)$

Consider an element X with atomic number and mass number,

${}_Z^A\text{X}$

Where,

A is mass number and Z is atomic number (number of proton or electron)