Choose the INCORRECT statement. Select one: O a. Resonance is when more than one equally plausible structure can be written O b. Formal charges are apparent charges associated with atoms in a Lewis structure. In a molecule, hydrogen and halogen atoms are always at terminal positions Od. In a Lewis structure, the number of valence electrons shown is one more for each negative charge. Oe. The central atom is typically the atom with the highest electronegativity.

Part II Practicing Coordinate Covalent Bonding for Molecular compounds. Example: Given the molecular compound SO, draw the molecular compound using the coordinate covalent bonding model. A. Calculate the total number of electrons. S = 1x 6 = 6 electrons O = 4 x 6 = 24 electrons Charge -2 = 2 electrons Total = 32 electrons B. Determine Center Atom (look for the single element) in this case S. C. Now make a single bond to all other elements to the central atom. You have used 8 electrons of the 32. 0- D. Place electrons around the atoms that are bonded to the central atom so that each will have 8 electrons around them (in this case each oxygen needs 6 more electrons or 3 pairs of electrons). : E. Make sure that the central atom has a full octet (8 electrons). In this case it does, so you are done. If not, one of the lone pairs of electrons from an outer atom will share a second pair of electrons with the center atom. Finally be sure that you have used all your electrons and NO MORE!

Which among the following statements is FALSE? A Double bond is shorter and stronger than triple bond. B Bonding theories are used to predict how atoms bond together to form molecules. C A covalent bond occurs when electrons are shared. D Having eight valence electrons is very stable and is called an octet. E Lewis structures only use the valence electrons in determining the bonding.

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