Chemistry
Chemistry, 21.08.2019 22:20, jasjoh39p0rp6i

Why do elements have more than one spectral line

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Physics, 24.07.2019 22:30, AgentPangolin
How can an element be identified using its emission spectrum? a. by measuring the frequencies of the spectral lines, and calculating the energies that these correspond to b. by measuring the wavelengths of the spectral lines, and then calculating the differences between adjacent wavelengths c. by heating the unknown element, and then comparing the emitted spectrum with known spectra of the elements d. by identifying the color of the first line of the spectrum, and comparing this to a chart of known spectra
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Physics, 29.07.2019 10:50, kahmir15
Laboratory experiments here on earth have determined that each element in the periodic table emits photons only at certain wavelengths. these photons are apparent to astronomers as either emission or absorption lines in the spectrum of an astronomical object, like stars in galaxies. astronomers can, by measuring the position of these spectral lines, determine which elements are present in the star itself or along the line of sight. when astronomers perform this analysis, they note that for most astronomical bodies, the observed spectral lines are all shifted to longer (redder) wavelengths. this is known as cosmological redshift and is analogous to the doppler redshift. what does this redshift indicate to us about the universe in general?
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Chemistry, 16.10.2019 23:30, adelarangelmartinez
An astronomer determines a spectral line to have a wavelength of 6677.95å. given the lab’s spectral line data table, which element likely created that line? a.ferium b.iron c.hydrogen d. hydrogen or helium e.calcuim
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Physics, 23.10.2019 05:00, KingKayyy2322
According to the equation for the balmer line spectrum of hydrogen, a value of n = 3 gives a red spectral line at 656.3 nm, a value of n = 4 gives a green line at 486.1 nm, and a value of n = 5 gives a blue line at 434.0 nm. calculate the energy in kilojoules per mole of the radiation corresponding to each of these spectral lines. mcmurry, john e.. chemistry (p. 189). pearson education. kindle edition.
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