JEE Main Chemistry question

The line spectra of two elements are not identical because

(A)The elements do not have the same number of neutrons
(B)They have different mass numbers
(C)Their outermost electrons are at different energy levelsCorrect
(D)All of the above

Answer: (C)

Solution

A line spectrum arises from transitions between the quantized electronic energy levels that are characteristic of each element's electron configuration (determined by its atomic number). Since each

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Question ID VK-132354