Proton: A subatomic particle with a positive charge, found in the nucleus of an atom. In the context of acids and bases, it refers to a hydrogen ion (H+).
Acidity: The level of acidity in a substance is determined by its concentration of hydrogen ions (H+). The higher the concentration, the more acidic the substance is.
Ionization: The process by which an atom or molecule gains or loses electrons to form charged particles called ions. In the case of acidic hydrogens, they lose their electron and become positively charged protons (H+).