About: http://webisa.webdatacommons.org/373209768

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	Because the density of a gas (at a given temperature and pressure) depends mostly on the atomic weight of the atoms or molecules in it, hydrogen is the lightest gas of all.
http://www.w3.org/ns/prov#wasQuotedFrom	theodoregray.com