Final answer:
Vanadium has 23 protons and usually 23 electrons when neutral. As V3+, which is Vanadium with a +3 charge, it has 20 electrons after losing three electrons to acquire this charge.
Step-by-step explanation:
Vanadium (V) is a transition metal that can have multiple charges or oxidation states, ranging from +2 to +5. When vanadium has a charge of +3, it is indicated as V3+. The atomic number of vanadium is 23, which means it has 23 protons and, when neutral, 23 electrons. To determine the number of electrons in V3+, we subtract the charge from the atomic number. So, vanadium with a +3 charge has 20 electrons (23 - 3 = 20).