A certain type of atom has only four energy levels, as shown in the figure above. The total number of spectral lines produced by this element is
A) 6.
B) 4.
C) 10.
D) 3.
E) impossible to determine without further information.

Question

Quizplus · Accepted Answer

The number of spectral lines produced by an atom with 'n' energy levels is given by the formula n(n-1)/2. For 4 energy levels, the number of spectral lines is 4(4-1)/2 = 6.

A Certain Type of Atom Has Only Four Energy Levels