sketch and label a helium-4 atom and helium-5 atom to include the protons, neutrons, and electrons. how are they alike and how are they different?

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?

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains