Which set of terms best defines what affects kinetic energy and potential energy respectively​

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.