* Lithium's Atomic Number: Lithium has an atomic number of 3. This means a neutral lithium atom has 3 protons.
* Most Common Isotope: The most common isotope of lithium is lithium-7. This isotope has 4 neutrons (7 total nucleons - 3 protons = 4 neutrons).
* Other Isotopes: There are other isotopes of lithium (like lithium-6), but none of them have more neutrons than protons.
Therefore, even the most common isotope of lithium has an equal number of protons and neutrons.
