Hypernuclei are named in terms of their atomic number and baryon number, as in normal nuclei, plus the hyperon(s) which are listed in a left subscript of the symbol, with the caveat that atomic number is interpreted as the total charge of the hypernucleus, including charged hyperons such as the xi minus (Ξ) as well as protons. For example, the hypernucleus Λ O contains 8 protons, 7 neutrons, and one Λ (which carries no charge).