About 25 of the 92 natural elements are known to be essential to life. which four of these 25 elements make up approximately 96% of living matter? a. carb

There are 25 elements out of natural elements which are essential to life however the following four elements make 96% living material

a) carbon

b) hydrogen

c) oxygen

d) nitrogen

It is quite obvious that living matter is made up of organic compounds mainly, and organic compounds mainly have C, H , N  and O

i can ! i just need to know what the paragraph is! : p

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.