The charge of the nucleus of any atom is always what type of charge?

The nucleus of an atom is composed of protons and neutrons, with protons carrying a positive charge and neutrons being neutral. The positive charge of the nucleus comes from the presence of protons; as the number of protons increases, the overall charge of the nucleus becomes more positive. This positive charge is essential because it exerts an attractive force on the negatively charged electrons that orbit the nucleus, helping to hold the atom together.

Understanding the nature of the nuclear charge is fundamental in atomic theory and chemistry. It contrasts with the various types of charges that other components of the atom may have. For instance, electrons are negatively charged, while neutrons contribute no charge at all. Since all atomic nuclei, regardless of the element, contain protons and thus have a positive charge, it's clear why the nucleus's charge is always classified as positive.