👉 Valency is a concept in chemistry that refers to the degree of electron affinity or ionization energy of an atom. It measures how strongly an atom attracts electrons and what happens when these electrons are removed from atoms with different valence states. In other words, valency is a measure of how much of a substance's chemical properties depend on its atomic number (the number of protons in the nucleus) and the type of electron configuration. For example, if an atom has two electrons in its
