How many atoms are there in total in a molecule of sulfur trioxide, SO3?

The rules of engagement (roe) working group is often used to (select all that apply.)

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out

How many neutrons does an element have if its atomic number is 50 and its mass number is 166