If I absolutely had to answer with two atoms, I'd say carbon and hydrogen. This is because carbon is the absolutely indispensible atom that is the absolute basis of all organic molecules, forms they're backbones, and it is carbon's ability to make multible chemical bonds that allows for complex molecular structures. Secondly, hydrogen because any time a carbon molecule has a free chemical bond (not bound to another carbon or some other atom), it bonds to hydrogen. Hydrocarbons are entirely carbon and hydrogen.
I must say however that for some organic molecules (e.g. carbohydrates) I would have to say there are three atoms which are the basis: carbon, hydrogen, and oxygen.
Elements that are part of organic molecules are:
Carbon
Hydrogen
Oxygen
Sulphur
Iron
Phosphorous
etc.
Organic substances typically contain Carbon and Hydrogen. However, there are a vast number of organic substances that contain oxygen and nitrogen and quite a few other elements too.
Carbon and Hydrogen
Carbon (C) and Oxygen (O)
Carbon and hydrogen
Organic molecules do contain carbon, and the "complex molecules of life" are organic molecules.I can't quite figure out just how you're trying to put those two concepts together in your question, so I'm not positive that I've addressed what you were attempting to ask.
Molecules are collections of two or more atoms.
Every single organic molecule contains two or more atoms.
Two molecules of ammonia contain 6 hydrogen atoms.
Molecules form from the combination of two or more atoms. Matter is neither created or destroyed, just moved around by chemical reactions.
Two or more.
an organic molecule is any molecule that contains carbon atoms in a covalent bond where two or more atoms share electrons.
Organic molecules do contain carbon, and the "complex molecules of life" are organic molecules.I can't quite figure out just how you're trying to put those two concepts together in your question, so I'm not positive that I've addressed what you were attempting to ask.
Atoms. Molecules are two or more atoms together.
There are 4 oxygen atoms in two oxygen molecules.
Molecules are collections of two or more atoms.
Every single organic molecule contains two or more atoms.
Two molecules of ammonia contain 6 hydrogen atoms.
Two atoms.
Molecules are substances consisting two or more atoms.
Molecules form from the combination of two or more atoms. Matter is neither created or destroyed, just moved around by chemical reactions.
A molecule is consisted of two or more atoms bonded together.