Of the 24 valence electrons available in NO 3 -, 6 were used to make the skeletal structure. Now we need to add lone pairs of electrons.This usually means the atom lower and/or to the right in the Periodic Table, N in this case. The central atom will be the one that can form the greatest number of bonds and/or expand its octet. Draw a skeletal structure for the molecule which connects all atoms using only single bonds.This will be the sum of the group number a of all atoms plus the charge. First determine the total number of valence electrons in the molecule.The following is an example of how to draw the "best" Lewis structure for NO 3 - (learning by example). the octet rule and formal charges need to be satisfied. The goal is to obtain the "best" electron configuration, i.e. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms. It is used to show how the electrons are arranged around individual atoms in a molecule. \)Ī Lewis Structure is a very simplified representation of the valence shell electrons in a molecule.
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