Chapter 9, Problem 9.23UKC

Compare fluorine-18 and fluorine-19 with regard to each of the following: (a) atomic number; (b) number of protons; (c) number of neutrons; (d) mass number. Give the isotope symbol for each isotope. F-19 is a stable nucleus and F-18 is used in PET scans.

Interpretation Introduction

Interpretation:

The atomic number, mass number, number of protons, the number of neutrons and the isotope symbol of $\text{F-18}\text{\&}\text{F-19}$ has to be given.

Concept introduction;

Atomic number (Z):

Atomic number of an element is the number of protons found in the nucleus of every atom of that element.

Mass number (A):

Mass number of an element is defined as the total number of protons and neutrons in an atom.

Explanation of Solution

Fluorine-18:

The element is Fluorine-18.

The atomic number is $9.$

The mass number is $18.$

The number of protons is $9.$

The number of neutrons is $9.$

The isotope symbol is ${{}_{\text{9}}}^{\text{18}}\text{F}\text{.}$

Fluorine-19:

The element is Fluorine-19.

The atomic number is $9.$

The mass number is $19.$

The number of protons is $9.$

The number of neutrons is $10.$

The isotope symbol is ${{}_{\text{9}}}^{\text{19}}\text{F}\text{.}$