2007-04-10 08:51:44 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Biology
The four most common elements in living things are CHON - carbon, hydrogen, oxygen and nitrogen. Of course, you need Na, Cl, S, P and many others to be healthy!
2007-04-10 08:55:33 · answer #1 · answered by matt 7 · 1⤊ 0⤋
Percent composition of human body, by mass:
Oxygen 65
Carbon 18
Hydrogen 10
Nitrogen 3
Calcium 1.5
Phosphorus 1.2
Potassium 0.2
Sulfur 0.2
Chlorine 0.2
Sodium 0.1
Magnesium 0.05
Iron, Cobalt, Copper, Zinc, Iodine <0.05 each
Selenium, Fluorine <0.01 each
But the real answer to your question is "most of them", because you can find just about any element in some minute concentration anywhere you look (human body or otherwise).
2007-04-10 16:34:42 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Oxygen (65%)
Carbon (18%)
Hydrogen (10%)
Nitrogen (3%)
Calcium (1.5%)
Phosphorus (1.0%)
Potassium (0.35%)
Sulfur (0.25%)
Sodium (0.15%)
Magnesium (0.05%)
Copper, Zinc, Selenium, Molybdenum, Fluorine, Chlorine, Iodine, Manganese, Cobalt, Iron (0.70%)
Lithium, Strontium, Aluminum, Silicon, Lead, Vanadium, Arsenic, Bromine (trace amounts)
2007-04-10 16:14:29 · answer #3 · answered by §}:{§ 3 · 0⤊ 0⤋
You also have Ca, Mg, Fe.
2007-04-10 16:10:50 · answer #4 · answered by Wurgulf 1 · 0⤊ 0⤋
H,O, N, P, uhm i think that there's another... not sure
2007-04-10 15:56:31 · answer #5 · answered by Luna_5 2 · 0⤊ 0⤋