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

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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