Chemistry, 29.07.2019 23:00, natd299736

Why is a spectrum for a given element unique for that element? a. no element has more than two electrons in the first shell. b. each element has a unique arrangement of electrons. c. atoms of different elements have different masses. d. atomic nuclei contain no electrons.

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Why is a spectrum for a given element unique for that element? a. no element has more than two ele...