Biological significance of various elements in the Periodic Table

Although Carbon Oxygen Hydrogen Nitrogen and Phosphorous are by far the most notorious elements in biochemistry. Many others are vital, and others extremely useful tools in diagnostics and therapeutics while others are needed in small amounts and toxic in large.
The following are a few examples:

1) H - most abundant element in the universe (95%)
H2 gas, next energy currency molecule, Hindenburg
2H = deuterium, 3H = tritium (radioactive isotope)
H+ = a proton , ph low (high acid) when [H+] high   ........  ZANTAC

2) He - the breakdown product of radioactive uranium and the final product of fusion
- inert gas (noble) mixed with O2 in deep sea bathyspheres

3) Li - antidepressant for bipolar disorders  (manic depression)

4) B - botanical Trace Element (TE) , boric acid , borax

5) C - building block of organic chemistry
carbon, graphite, diamond, Buckminsterfullerenes (like a geodesic dome or soccer ball)
6) N found in all amino acids, nucleic acids, narcotics and as a result all waste products since it toxic and prone to forming toxins and narcotics.

UREA history URIC ACID disease   AMMONIA chemistry

7) O high E, oxidant = removes electrons
- product of hydrolysis in photosynthesis
- used in respiration (oxidation of glucose)

8) F highest E , helps prevent cavities and osteoporosis

9) N - inert gas , neon lamps, lasers, the bends

10) Na - important blood plasma electrolyte
- very important ion in the neuron
neuron action potential sim      animations