14. When the Danish physicist Niels Bohr proposed that the energies of electrons

Question

14.  When the Danish physicist Niels Bohr proposed that the energies of electrons inside atoms were quantized,

A.    he meant that the electron could have only particular, allowed energies

B.     he had a complete explanation for this effect.

C.     it contradicted the work of the German physicist Max Planck.

D.    it helped explain classical physics.

E.     it confirmed the work of the British scientist Rutherford.

15.  How many electrons can an n = 6 orbit or shell theoretically hold?

A.    72

B.     8

C.     18

D.    32

E.     50

Explanation / Answer

14. A.he meant that the electron could have only particular, allowed energies

Quantization => having only particular, allowed energy values


15. A.72

Number of electrons = 2 x n^2 = 2 x 6^2 = 72 electrons

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