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Unformatted text preview: configuration of the noble gas argon. In Lewis structures the bonding pair of electrons is usually displayed as a line, and the unshared electrons as dots: The shared electrons are not located in a fixed position between the nuclei. In the case of the H 2 compound, the electron density is concentrated between the two nuclei: The two atoms are bound into the H 2 molecule mainly due to the attraction of the positively charged nuclei for the negatively charged electron cloud located between them For the nonmetals (and the 's' block metals) the number of valence electrons is equal to the group number: Element Group Valence electrons Bonds needed to form valence octe F 7A 7 1 O 6A 6 2 N 5A 5 3 C 4A 4 4 Examples of hydride compounds of the above elements (covalent bonds with hydrogen: Thus, the Lewis bonds successfully describe the covalent interactions between various nonmetal elements...
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