A) an atom has energy states having a continuous distribution
B) nothing can be send a bond energy states bf atom
C) at atom has energy states, having discreat values
D) atom is an indivisible particle
Correct Answer: C
Solution :
The series of experiments by Frank and Hertz in 1914 produced direct evidence for energy, levels m atoms. In studying the motion of electron through mercury vapour under the action of an electric field they observed that the spectrum line at 254 nm was emitted by the vapour when the electrokinetic energy was greater than 4.9 eV. But was no spectrum line when kinetic energy was found less than 4,9 eV.
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