1. Number of Protons: The number of protons in an atom defines its atomic number and is unique for each element. In this case, the atom has 4 protons.
2. Neutral Atom: A neutral atom has an equal number of protons and electrons, meaning that the positive charges of the protons are balanced by an equal number of negative charges from the electrons.
Therefore, if the atom has 4 protons, it must also have 4 electrons to maintain a neutral charge.