Answer:
Fluorine
Step-by-step explanation:
Data obtained from the question include:
The isotope of fluorine has:
Proton = 9
Neutron = 10
The atomic number is the proton number of the atom.
Therefore, the atomic number = 9
Mass number = proton + Neutron
Mass number = 9 + 10
Mass number = 19
Now comparing the above with the fluorine atom in the periodic table. We'll discover that the isotope is actually fluorine atom.
Therefore, the name of the isotope is fluorine