Question

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

Mass number \(A=\) number of protons \(+\) number of neutrons. Given protons \(= 9\), neutrons \(=10\), so \(A = 9 + 10\).

Step2: Simplify the expression

\(A=19\)

Answer:

fluorine - 19