Chapter 8 Bonding and Molecular Structure - Study Questions - Page 337d: 59

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$BF_3$: boron has three valence electrons and is making three bonds, it is surrounded by 6 electrons. $SeF_4$: Se has 6 valence electrons and it's making 4 bonds, it's surrounded by 10 electrons $BrF_4^-$: Br has 7 valence electrons, gained 1 and it's making 4 bonds, it's surrounded by 12 electrons $XeF_2$: Xe has 8 valence electrons and it's making 2 bonds, it's surrounded by 10 electrons