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Consider your observations for Li and Na, the first two alkali metals: each showed only a single emission line. The ground-state electron configuration for these metals is [He]2s and [Ne]3s, respectively. Since there is only one electron in their valence shells (the rest of the electrons are core electrons), they are "almost" hydrogenic atoms, and we can try and use the Rydberg formula to explain their spectra. However, the emission line you observed for each does not correspond to a transition involving a change in principal quantum number, n. Rather, each involves a change in magnetic quantum number, l. We need to make some adjustments to get this to work.
1) I've provided the ground-state electronic configurations of these elements. Please write the excited-state electron configurationfrom which these elements emitted photons. (You may find this link useful, if you haven't already found something similar: https://physics.nist.gov/PhysRefData/ASD/lines_form.html Note that the spectroscopic notation here indicates a neutral atom as, e.g., Na i, a singly-ionized atom as Na ii, a doubly-ionized atom as Na iii, etc. It's just a historical convention.)
In an electrolysis cell similar to the one employed in this experiment, a student observed that his unknown metal anode lost 0.238 g while a total volume of 84.90 mL of H2 was being produced.
you are given a cube of silver metal that measures1.012 cm on each edge. the density of silver is 10.5 gcm3. the cube
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Consider a reaction where 27.0 grams of mercuric oxide (a red solid compound) is heated and completely decomposes to give the elements oxygen and mercury. IF 2.0 grams of oxygen is produced by this reaction
V = 4.55 mL at 147 atm. What is the pressure if the volume changes to 10.0 mL?
In an effusion experiment, it was determined that nitrogen gas, , effused at a rate 1.812 times faster than an unknown gas. What is the molar mass of the unknown gas
Phosphoric Acid, H3PO4(aq) is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH and the concentrations(M) of all species in a 0.450 M phosphoric acid solution.
Problem- Uranium-235 is an essential component of the fuel in the nuclear power plant. What is the binding energy per nucleon for 235U in MeV
In a particular redox reaction, Cr is oxidized to CrO42%u2013 and Ag is reduced to Ag. Complete and balance the equation for this reaction in acidic solution. Phases are optional.
An equilibrium mixture contains {\rm{N}}_2 {\rm{O}}_4, (P = 0.27 atm) and {\rm{NO}}_2 (P = 1.2 atm) at 350 {\rm K}. The volume of the container is doubled at constant temperature.
Suppose 286 mL of 0.215 M MgCl2 is mixed with 173 mL of 0.382 M NaOH and allowed to react completely. Volume change at precipitation can be ignored.
How Much Acetic Acid is in Vinegar - Brief description of the goal in this experiment.
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