how many covalent bonds are there? show them by dash structure
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Covalent bonds operate through an entirely different means: the sharing of electrons. By sharing electrons, two atoms can mutually complete their valence shells to become more stable. A molecule is a collection of atoms held together by covalent bonds.
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Fluorine and the other halogens in group 7A (17) have seven valence electrons and can obtain an octet by forming one covalent bond. Typically, the atoms of group 4A form 4 covalent bonds; group 5A form 3 bonds; group 6A form 2 bonds; and group 7A form one bond.
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