just need some help setting up the first 3 . please and thank you :) 15 18846/rn
ID: 1037377 • Letter: J
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just need some help setting up the first 3 . please and thank you :)
15 18846/rnod-resource/content/10/Chrm 1 40exam3.la17.pdf Name Date: November 14, 2017 CIIM 140- Unit Examination Three 106 Points One (14 Points). A line in the Hydrogen emission spectra results when an electron moves from the n 4 shell to the n 2 shell. (10 Points) Calculate the energy (in joules) when the electrons moves from n-4 to n- 2 (4 Points) From that energy calculate the wavelength L?6Points) Show the complete spdfconfiguration for the following. Si Three (16 Points) Show the noble gas spdf configuration for the following Ir Te" Bi Four (12 Points) Provide an orbital box diagram using "noble gas designations (6 Points) Rhenium, ReExplanation / Answer
we have the formula,
1/? = 1.0977*10^7(1/n1^2-1/n2^2)
1/? = 1.0977*10^7((1/2^2)-(1/4^2))
? = 4.8586*10^-7 m
? = 485 nm
we know that,
E = hc/?
E = (6.625*10^-31 * 2.998 * 10^10)/(485* 10^-9)
E = 4.0952 * 10^-14 J
Electronic confogurations,
F - 1s2 2s2 2p5
Si - 1s2 2s2 2p6 3s2 3p2
Se - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
se-2 - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
V - 1s2 2s2 2p6 3s2 3p6 4s2 3d3
V+2 - 1s2 2s2 2p6 3s2 3p6 3d1 4s0
U - [Rn] 5f3 6d1 7s2
Ir - [Xe] 4f14 5d7 6s2
Te - [Kr] 4d10 5s2 5p4
Te-2 - [Kr] 4d10 5s2 5p6
Bi - [Xe] 4f14 5d10 6s2 6p3
Bi+3 - [Xe] 4f14 5d10 6s2 6p0
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