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19. Identify the orbital A. 2 p. B. 2 dayz C. 2 d. D. 3 P2 20. Which is a correct set of quantum numbers for an electron in a 3d orbital on a H atom? A. (3.3,-2,%) B. (3,2,3,0) C. (3,-2,-2,%) D. (3.2,-2. ) E. none is correct E. 3 d.2 QUESTIONS 21 - 29,5/3 POINT EACH Rank the following four species in order of atomic radius. Use the letters from A (smallest) to D (largest) to organize the five species listed below. For example, if you think the species listed as "16" is the smallest, you will bubble letter A as the answer to question 16 on the Scan Tron sheet. 21._Sr? 22. Rb 23._ Br 24. Sep Rank the following five species in order of ionization energy. Use the letters from A (smallest) to E (largest) to organize the five species listed below. For example, if you think the species listed as "21" is the largest, you will bubble letter E as the answer to question 24 on the Scan Tron sheet. 25. F 26.0 27. _N 28. Be 29. Li OPEN ENDED QUESTIONS 30 - 32, 7 POINTS EACH 30. Au" is the most stable ion of gold, element 79. a. Write the short electron configuration. b.write the short orbital diagram of Au'', c.Is Au" paramagnetic? Explain briefly.

Answer 1

so radial nodes . the = 2 Angular nodes H=2 • Total nor of hodes = 2 n-1-2 = n = 2+1-3 - n=3 & 2 = 2 3dy² – Orbit 8. (20 sd orbital n=3 e=2 (for d orbital) o o me = -2,0-1, 0, 1, 2 ms = + 1/2,-1/2 = (3,2,- 2,1/2) is correct

(21-24) a group when we move top to bottom in atomic radius increases. in a period & when we move left to right atomic radius decreases. i Ritx syt? & se? > Br- → Potassium CKD se-2 > B8- [2 Period -4] group-1 Rb>k> se-2 > B8- +2 cats se-2 > B8 rperlod -4] = group-2 & cat? <s8+2 Rot > S&ta > se-2 > By- 122) > (21 124) > (23)

(25-29) " when we move left to right in a period atomic radius decreases. Li > Be> N > O F or period-2.] (29) > (28) > (29) (26) > (29 AU - [Xe] 441 4 5 0 10 65'. [Xe] 4414 588 Au +3 (b) INTL N 1 1 1 dps.yz dz² dy diz dyz sal o no. of free eleo in)=2 = A4+3 is para magnetic 2 = J nen+2) - 121242) +38 .