tight enntted by a hydrogen alcnn with . -19 G. 6a6 ()3.00 1O 6. Rank of increas

Question

tight enntted by a hydrogen alcnn with . -19 G. 6a6 ()3.00 1O 6. Rank of increasing energy, frequency and wavelength. all rankings the following emissions (how do we know they are emissions and not absorptions) in terms Note that they may not be in the same order for 1) n-4 ton-22)n- 4ton-1 Lowest energy Lowest frequency Shortest wavelength Highest energy Highest frequency Longest wavelength Write the chemical reactions for the first three ionization energy's of beryllium. Which ionization energy would be significantly higher than the other two? Why? 7. 8. What element has the electron configuration: [Kr]5s24d105p2 [Arj4s23d104p4 AS 9. What is the electron configuration of each of the following? Zr 3s 3p 10. Identify the orbitals with the following quantum numbers. n-2, I-0, ml-0, ms-1/2

Explanation / Answer

6) eelctron transfer from higher level to lower level,it is emmission.

   lowest energy = 3 , highest energy = 2

   lowest frequency = 3 , highest frequency = 2

   shortest wavelength = 2 , longest wavelength = 3

7) Be(g) ---> Be^+(g) + e-   I.E1

    Be^+(g) ---> Be^2+(g) + e- I.E2

    Be^2+(g) ---> Be^3+(g) + e- I.E3

Be = 4 = 1s2 2s2 , from eelctronic configuration, removal of third electron is associated with high eenrgy.due completely filled orbital and also lower eenrgy level.

highest eenrgy = I.E3

10)

n = 2,l=1,ml = - 1, ms= -1/2

   orbital = 2Px

n = 4,l=2,ml = - 2, ms= -1/2

   orbital = 4dxy

   n = 2,l=0,ml = 0, ms= -1/2

   orbital = 2S

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