Calcium is represented in the spectrum below. So Option 'D' is the correct answer. A spectrum is a graph that depicts the amount of light emitted at different energies.
What is spectrum?
A spectrum is a graph or chart that shows how much light is emitted across a wide range of energies. Atomic spectroscopy studies the excitation of conduction electrons in any element.
Because sodium has one electron in its outermost shell and calcium has two, their atomic spectra should have one atomic spectral line and two atomic spectral lines, respectively.
Calcium is represented in the spectrum below. So Option 'D' is the correct answer. A spectrum is a graph that depicts the amount of light emitted at different energies.
Hence option D is correct.
To learn more about the spectrum refer to the link;
brainly.com/question/1553971
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