ethylene (ethene) plant hormone and polyethylene (PE) building block, molecular model. Atoms are represented as spheres with conventional color coding: hydrogen (white), carbon (grey)
Caffeine (Caffeine) molecule. Atoms are represented as spheres with conventional color coding: hydrogen (white), carbon (grey), oxygen (red).
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Facebook molecule. Atoms are represented as spheres with conventional color coding: hydrogen (white), carbon (grey), oxygen (red).)
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