Question

Please help urgent( will rate):)

hi so the right answer to these questions are the ones ive circled

but i just dont understand why.

thanks

28 6. He ions are prepared with the electron in the T=X state. The electrons relax to lower energy states, by one or more transitions, and produce an emission spectrum with light at 6 difference wavelengths. What is the value of X? A. 3 B. 4 С. 5 D. 6 Е. 7 7. Monochromatic light with a wavelength of 2.70 nm strikes a sample of gaseous ground state C5* ions. What happens? A. The light is absorbed, and the electron is promoted from nj=1 to n =2. The light is absorbed, and the electron is promoted from n-1 to n-3. C. The light is absorbed, and the electron is promoted from ni-1 to n 4. D. The light is absorbed, and the electron is promoted from ni 1 to n 5 E. The light is not absorbed, and the electron remains in the n=1 shell. B.

the answer to 15 is D

Answer 1

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Q.no 15 is not completely visible therefore I couldn't do it but I do the rest and I hope it helps u alot.

② formella used No of spectralline = n(n-1) here spectal line 6 50 6 = (n-1). 2 12 = n2-n on solving value of 1 L [n=4 n represent e xuled state. optim ® is correct . ② from E = R ( + 7 + 2) 2² 1 - 1096776"(th) (E) 2 1 = 2.700m = 9.70x1077.com . 2.70xló tem = 10969360" x 36 (+-) n2- n2² 2.70x157 cm x 109677 cm'x36 ,2 - 31.066 n2² = 1.066 (n2²-1) na? = 1066 ne? - 1.066 0.066 nz? = 1-066 ne = 1-ocs 3191 0.067 =14 So ni = 1 ng = 4 option © correct optim 7 correct nou imber of unpaina e Sc 30'45 - Number of unpoired Cy = 305 45 N: 2= 388 Mr = 325 us2 ERP & 3d gning