Consider a hypothetical atom with an atomic number of 4 and a net electronic charge of +1. How many neutrons does this atom have?
The answer cannot be determined by that information. Correct
All the atoms of an element have the same number of protons, but some atoms have more neutrons than other atoms of the same element and therefore have more mass. Without the mass number (number of protons + neutrons), it is not possible to determine the number of neutrons.