$$O-S-O$$ $$;;|;;;|$$ $$O;;;O$$
In the "Octet Rule" version (4 single bonds), the formal charges are: +2 Oxygen atoms: -1 each lewis dot structure of so42
$6 + 24 + 2 = \mathbf32$ valence electrons . $$O-S-O$$ $$;;|;;;|$$ $$O;;;O$$ In the "Octet Rule" version
Which part of the should we dive into next? lewis dot structure of so42
Place the remaining 24 electrons around the oxygen atoms to satisfy their octets. Each oxygen will receive 6 electrons (3 lone pairs).