Answer:
a) NF3
b) ClO3-
c) HOBr
d) SO3-2
Explanation:
• To write the Lewis structure, it os important to look for the number of valence electrons of each atom in the Periodic Table of Elements.
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• It is necessary that the atoms reach the Octet rule, that is, that each atom has 8 electrons in the molecule (except cases such as Hydrogen, which can have only 2 electrons per bond).
a) N has 5 valence electrons and F has 7 valence electrons.
b) Cl has 7 valence electrons and O has 6 valence electrons. In this case, as Cl completes its octet with the bond to 2 Oxygens atoms, it gives the extra electron to the third Oxygen atom, which generates the -1 charge.
c) H has 1 valence electron, O has 6 valence electrons and Br has 7 valence electrons. In this case, we have to write in the center the atom that is more electronegative.
d) S and O have 6 valence electrons, but S gives electrons to the 2 Oxygens.
