Cause the Stars Compose the dark matter and so is the Gas and inside of it,it's the Dust
The answer is that the pebbles turn into sand
A Resonance structure is the Lewis structure of every atom in the molecule, that gives one Lewis structure. But they called it resonance structure to have a change.
There is 7 resonance structures for SO3, like the images below:
That it is number 17 35.45 it's period is 3.
Hope that helped ^^