Chapter AS, Problem 9PQ

Interpretation Introduction

Interpretation:

The difference between $\text{Mg}$ and ${\text{Mg}}^{2+}$ ion has to be mentioned.

Concept Introduction:

An atom is considered to be simplest unit of any matter that makes up an element. It is further composed of 3 subatomic particles: electrons, protons, neutrons.

Negatively charged species are electrons, positively charged species are protons and neutral species are neutrons. Number of protons or electrons comprise atomic number of element whereas sum of protons and neutrons comprise atomic mass of an element.

An atom $\text{X}$ with its atomic number and atomic mass is represented as follows:

  ${}_{\text{Z}}^{\text{A}}\text{X}$

Here,

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

  $\text{A}$ is atomic mass of an atom.