31. Cathode-ray tubes experiments conducted by J. J. Thomson evidenced the presence of(A)Protons(B)Electrons(C)X-ray(D)Photons

10. Which of the following statements is false?(A)For monoelectron atom, the 4s orbital lies lower in energy than the 5s orbital.(B)For a potassium atom, a 4s orbital, a 4p orbital, and a 4d orbital all have the same energy.(C)For a hydrogen atom, a 4s orbital, a 4p orbital, and a 4d orbital all have the same energy.(D)The 4s orbital lies lower in energy than the 3d orbital for atoms K, Ca, Sc, and Ti.

31. Cathode-ray tubes experiments conducted by J. J. Thomson evidenced the presence of
(A)Protons
(B)Electrons
(C)X-ray
(D)Photons

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