Comparison of Abundance of Elements
There are 92 naturally occurring elements; only 17 of them make up 99.5% of the earth’s crust (including oceans and atmosphere). In living things (plants, animals, people) the six most abundant elements are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. The universe is dominated by the elements hydrogen (83%) and helium (16%) 1. The Crust…
