(25points) Explain in your own words the difference between atomic mass and atomic number. Where can you find this information on the periodic table?

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

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?

Why are pipes bursting in the in extremely cold weather?