About: http://webisa.webdatacommons.org/197785534

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	M is a hydrogen atom, an alkali or alkaline earth metal or an ammonium group, and
http://www.w3.org/ns/prov#wasQuotedFrom	google.es