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Basically “attraction” and “repulsion” are the result of the composed action of some kind of forces. Regarding an atom-atom interaction, even if technically the gravitational attraction exists I assume in this discussion it can be neglected, hence basically you have just the electrostatic interaction as the dominant force. Considering a couple of ...


Atoms have mass, all mass has gravity and everything with gravity attract. Then you have different types of chemical bonds between other atoms.

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