How do we account for the great variety of substances in the world? how do we account for the great variety of substances in the world? most of these substances are organic compounds. atoms are incredibly small. the earth is 4.5 billion years old. there are many possible combinations of atoms?

There are many possible combinations of atoms

Explanation:

Atoms in the periodic table can combine in a myriad of ways – sometimes quoted to approximately 10^78 combinations.  To understand the enormity, carbon (and its ability to form numbers combination with other elements) is the main element significant in the variations of organic life on earth.