Chemistry and Chemical Reactivity (9th Edition)

$BF_3$: 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