formal charge?? SO3 octet violator...?

[beauml]

okay.... 48hrs left and still suffering on basic skills...

oh well, formal charge on S in SO3 is 0. (i thought it was +2)
after some goolging, there's this thing called octet violators.
and S is one of them because it is located in third row or period.

S ended up having 12 electrons about it.
3 double bonds, each connecting Os.
i guess it can not form more bonds because then O will violate octet rule.

so here is the question. how come SO4 only forms 6 bonds not 8 bonds?

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[Shazzam]

Sulfur has 6 electrons to work with, it cannot form more than 6 bonds because it doesn't have anymore electrons to create bonds with. Keep in mind, like sulfur tri-oxide, it still has a total of 12 electrons surrounding it.