How many protons of aluminum ion (Al+3) has if its atomic number is 13?

Which of the following is the smallest particle of an atom?

What is the charge of an ion if it has 8 protons and 9 electrons?

Which subatomic particles are located outside the nucleus?

The scientist who is best known for his "Plum Pudding" model of the atom.

Helium has 4 atomic mass, 2 atomic numbers, 2 electrons, 2 protons, and 2 neutrons. Which of the following is the correct distribution of subatomic particles of Helium?