What isotope has 18 protons and 22 neutrons?
This a neutral atom of
Always remember that the number of protons represent the Atomic no. of that particular element.
In this case the number of protons is
And the element with atomic no.
Now we need to find the mass number of
Mass number of Argon=
No of Neutrons
A neutral atom of argon also has
So,It is clear that this is not an isotope but a neutral atom of