They do combine in whole number ratios, but these ratios need not be simple - particularly in some organic compounds.
In simple whole number ratios
simple whole number ratios
Dalton's atomic theory states that atoms of different elements combine in simple whole-number ratios when they form compounds.
John Dalton, the father of modern chemistry, said that atoms combine in simple whole-number rations to form compounds.
Simple whole-numbered ratios
John Dalton
simple whole number ratios(more than one posible)
Synthesis
synthesis
Atoms can combine to form compounds, in simple whole number ratios
Anabolic pathways require energy to combine simple molecules into more complex ones.
To see if simple molecules can combine spontaneously.