The atomic mass is equal to what?​

The mass number

Explanation:

I hope this helps.

The atomic mass is equal to mass number

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.