In chemistry, hydrogen (TR:291) (LH:24) (TL:315), symbol H, the first element of the periodic table (Z:1), with a mass of 1.008 amu, comprised of one proton and one electron, with an electron configuration of: 1s1.
The following is an early estimate of the percent hydrogen in humans:
- “The human body contains carbon 13.5%, hydrogen 9.1%, oxygen 72%, nitrogen 2.5%, phosphorus 1.15%, sodium 0.1 %, calcium 1.3%, magnesium 0.001%, iron 0.01%, and traces of silicon and fluorine.”
- — Carl Kelsey (1916), The Physical Basis of Society (pg. 7) 
The sun by mass composition is 71% hydrogen, 27% helium, 1% oxygen, and 64 to 68 others elements in rarer amounts. The reaction of hydrogen with each other to produce helium is what makes for the heat and light output of the sun.
The following are related quotes:
- “Why should a group of simple, stable compounds of carbon (C), hydrogen (H), oxygen (O), and nitrogen (N), 'struggle' for billions of years to organize themselves into a professor of chemistry? What's the motive?”
- “Hydrogen is a light, odorless gas, which, given enough time, turns into people.”
- Hydrogen – Wikipedia Commons.
- Kelsey, Carl. (1916). The Physical Basis of Society (pg. 7). D. Appleton and Company.
- Thims, Libb. (2008). The Human Molecule (GB) (Amz) (Iss) (elemental composition table, pgs. 52-55). LuLu.
- Composition of the sun – HyperPhysics.
- Pirsig, Robert M. (1991). Lila: An Inquiry into Morals (struggle, 5+ pgs; quote, pg. 162). Random House, 2013.
- Wiley, John P. (1995). “Phenomena, Comments & Notes: Today’s physics allow outrageous possibilities: faster-than-light travel across the galaxy, or even our learning to make new universes to specification” (WB), Smithsonian Magazine, Dec.