Although the elements are not provided, I can explain how to find each.
Protons will always be the atomic number, so that’s that.
Electrons will depend on the charge based on the group of the periodic table. If the charge is -, then add a certain amount to the protons. If it is +, then subtract a certain amount.
To find neutrons, subtract the atomic mass from the atomic number (aka the protons) and voila! You have your neutrons.
Hope this helps!
