From the Greek for "acid former", this gas is the most abundant element in the earth's crust
It is the most 
abundant element in the earth's crust, and makes up almost 21% of the... [DOC] [TLE] Oxygen [PAR] Named from the Greek oxys + genes, "acid-former" oxygen was first described by 
... Sedziwj thought of the gas given off by warm nitre (saltpeter) as "the elixir of 
life".