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A. The Lewis diagram for PO(OH)3 is: The electron-pair geometry around the P atom in PO(OH)3 is fill in the blank 1. There are lone pair(s) around the central atom, so the geometry of PO(OH)3 is fill in the blank 3. B. The Lewis diagram for CH3- is: The electron-pair geometry around the C atom in CH3- is fill in the blank 4. There are lone pair(s) around the central atom, so the geometry of CH3- is fill in the blank 6 Please note that "geometry" refers to the molecular or ionic geometry. A. The Lewis diagram for BeI2 is: The electron-pair geometry around the Be atom in BeI2 is fill in the blank 1. There are lone pair(s) around the central atom, so the geometry of BeI2 is fill in the blank 3. B. The Lewis diagram for BF3 is: The electron-pair geometry around the B atom in BF3 is fill in the blank 4. There are lone pair(s) around the central atom, so the geometry of BF3 is fill in the blank 6.