The tetrahedral sp3 oxygen atom is use mainly to illustrate water/ice models and is found in all of our student sets and several teacher sets or is available separately.
Use only these genuine Molymod Atoms & Bonds for full compatibility with any of our Molymod Molecular Model Sets & Molymod Molecular Model Kits.
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Glad we could help. For anyone wanting to replenish a model set or kit or build a custom chemical structure, our 3D Molecular Model Builder will make your task much easier.