So4 -2 Lewis 'link' -

Every millisecond, the double bonds would hop from one Oxygen to another. Click. Now a different Oxygen has the double bond. Click. Now another.

Sulfur’s eyes lit up. "Of course!"

In reality, all four Sulfur-Oxygen bonds were —a perfect average between a single and a double bond (called a bond order of 1.5). The negative charge was spread evenly across all four Oxygens. so4 -2 lewis

"Let's bond!" said Sulfur. "I have six valence electrons of my own. You four each have six. Together, we can form a stable ring of eight."

To the other two Oxygens, he gave single bonds but with a heavy heart: "You will carry the negative charge for the team." Every millisecond, the double bonds would hop from

Suddenly, a wise old floated by. "You have a secret power, Sulfur," it whispered. "You are in Period 3. You can expand your octet. Use your empty 3d orbitals ."

But the Oxygen atoms were democratic. They didn't like that only two got the "honor" of a double bond. So they did something magical: . "Of course

And so, ( \text{SO}_4^{2-} ) became the most stable, famous, and well-respected ion in the valley. It was the backbone of gypsum, Epsom salts, and bathtub relaxation.