An element’s mass number tells the number of protons in its nucleus true or false?

Need in all of themmm only answer if you know plsssss

Asmall, positively charged ball is moved close to a large, positively charged ball. which describes how the small ball likely responds when it is released? it will move toward the large ball because like charges repel. it will move toward the large ball because like charges attract. it will move away from the large ball because like charges repel. it will move away from the large ball because like charges attract.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.