Why do different elements produce different line spectra?
Why do elements have different numbers of spectral lines?
What are the applications of spectral sequences in the real life? Why is three such a unique number? Are ions atoms of the same element with different numbers? Periodic Table: Why are group 1A elements called alkali metals? Why are isometric axes so important? Changing the number of electrons does what to the element? Why does electronegativity of group 15 elements decrease on moving down the group? Why do alpha helices, beta turns, and beta sheets induce a unique spectral signature in circular dichronism? Why does red line appear in hg emmision spectrum? Why are shorter wavelengths of light scattered more than longer wavelengths? Why is the number of waves made by an electron in any orbit equal to the principle quantum number? Why is 3 considered a magic number? How many elements are there? Why aren't there more? Why is white colour only showing once in the spectrum? What is spectrum in? Why is 8/1.5 not the same as 8*2/3? How are the valence electrons' numbers determined? How many natural frequencies can an object have? Why aren't even harmonics significant when compared to odd harmonics in power system? Why are Eulers number and Pi close to zero and 1? Why does more valence electrons mean more electronegativity? What is the reason that 33/11kv is a line voltage? Why do electrons in an atom exist in discrete energy levels, and why don’t they fall into the nucleus or radiate electromagnetic energy as they orbit? Why are irrational numbers irrational? Why is laser more monochromatic than ordinary light? Why is the number two irrational? Why do mathematicians distinguish between algebraic numbers and transcendental numbers? What is spectrum? Why don't signals with different frequencies don't interfere? What is Electromagnetic spectrum?