The answer is 4 million, there are about 9-10 million unique organic compounds that are known to exist
Erosion
waethring
deposition
pressure or heat
all of this can change the form of rock to another
The existence of an atom was first suggested by Democritus, the idea is then developed in 1803 by John Dalton.
According to Dalton's atomic theory, matter is made up of atoms which are inseparable and can not be destroyed further. For a given element, all atoms have identical mass and properties. Atoms of two different elements combine to form compounds and rearrangement of these atoms results in chemical reaction.
In order for plants to go through photosynthesis, they must use <span>B. visible light.</span>
Is the number of protons in an atom, or the total positive charge of an atom.
