what elements are present in the human body.
Chemical elements, of course, are composed of infinitesimal units of matter. The physical human body is built entirely of these assorted atoms and molecule packages of atoms. All atoms of an element are alike and all molecules of a chemical compound are alike. The number of elements in the human body is limited, the assortment of compounds and chemical mixtures is almost uncountable. Nature uses only 92 chemical elements to make the uncountable number of solids, liquids and gases in the entire world. Oxygen is so plentiful that it makes up almost half the total bulk of earthly substances. Precious gold makes up less than a millionth part of the earth’s crust, and rare argon makes up less than a hundred thousandth part of the gaseous atmosphere. A few atoms of francium exist briefly during the decay of certain radioactive substances. You might expect the miraculous human body to be made entirely of the rarest of elements, or at least the elements we rate as precious or valuable. Not at
