Which subatomic particle are paired with their charges?

Chemistry worksheet - i am not sure what they are asking for exactly?

What is the solubility-product constant of barium sulfate, baso4, if a saturated solution is 1.03 ´ 10-5 m?

Dona wrote the characteristics of two types of galaxies as shown below: type a: has a large flattened core type b: does not have a regular shape which statement is correct? type a is an irregular galaxy and type b is a lens galaxy. type a is a lens galaxy and type b is an irregular galaxy. type a is a spiral galaxy and type b is an elliptical galaxy. type a is an elliptical galaxy and type b is a spiral galaxy.