F2 has a total of 18 electrons, 9 from each fluorine atom. Two electrons are shared in F2 and only one bond is formed between atoms.
The bond that occur between two atoms of fluorine is a covalent bond. A covalent bond involves sharing of electrons between two or more atoms.
Each fluorine atom has 9 electrons so the molecule has a total of 18 electrons in the molecule F2.
Since each atom contributes one electron each to the covalent bond, only one bond (F - F)is formed between fluorine atoms with two electrons shared.
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