What is the essence of cathode rays?
A: proton
B: neutron
C: electron
D: atom
A: proton
B: neutron
C: electron
D: atom
举一反三
- The number of can determine the chemical element. A: neutron B: electron C: atom D: proton
- In 1932, physicists engaged in studying the atom and its nucleus had only three particles to consider: the proton, the neutron ,and the electron.
- If we have a tungsten anode (work function f=4.63 eV) and electron acceleration voltage of 35 kV, what is the minimum wavelength of the x rays? ( )
- In hydrogen atom the angular momentum of the electron in the lowest energy state ( )
- For the same nuclide, which character must be identical? () A: Proton number B: Neutron number C: Electrons number D: Energy state