. How many protons, neutrons, and electrons are present in an atom of hafnium, Hf, with a mass number of 178?

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs