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Covalent bonds of water (H2O)

A covalent bond is a chemical bond between two non-metal atoms. An example is water, where hydrogen (H) and oxygen (O) bond together to make (H2O). A full outer shell usually has eight electrons, or two in the case of hydrogen or helium. Valence electrons are the electrons held comparatively loosely in the outer shell of the atom. The structure of electron shells is determined by quantum mechanics.) view more...