Question

what happens if the number of protons in an atom change?
the number of neutrons will change
it becomes an isotope of an element
its ionic charge will become -1
it becomes a different element

Explanation:

The number of protons in an atom determines the element's identity. Changing the number of protons changes the atomic number, thus forming a different element. Isotopes have the same number of protons but different numbers of neutrons. A change in protons doesn't directly imply a specific ionic - charge change or a change in neutron number in a fixed way.

Answer:

It becomes a different element