What did james Chadwick discover A. proton B. neutron C. electron

Here’s one way to follow the scientific method. place the missing steps in the correct position in the process

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?

In 2002, the rare earth elements mine in mountain pass, california was closed because