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Dear user, we regret to inform you that SMG will be shutting down in December 2020. We appreciate your support over the past several years and deeply apologize for any inconvenience this may cause.


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These atoms look kind of lonely. Try to compose a molecule by dragging them around and creating a connection between them.


Click and drag to connect two atoms. Each atom has a valency from 1 to 6, so make sure that all of the valencies are used or else you will fail. Click on an atom to change its type.
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