Question

identifying an isotope an isotope of the element fluorine has 9 protons and 10 neutrons. what is the name of this isotope? fluorine-

Explanation:

Step1: Calculate mass number

$\text{Mass number} = \text{Protons} + \text{Neutrons} = 9 + 10 = 19$

Step2: Name the isotope

Isotopes are named with element + mass number.

Answer:

fluorine-19