{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

This preview shows pages 1–2. Sign up to view the full content.

Name: Answer Key October 18, 2010 TA: Robert 20A Disc 2K Quiz 2 1. Circle the letter of the set of quantum numbers that is NOT allowed (there may be more than one answer): (10 pts) a. n = 3, l = 2, m = 2, m s = 0 not allowed: m s = ± ½ b. n = 7, l = 4, m = ‐1, m s = ½ c. n = 2, l = 1, m = 2, m s = ½ not allowed: m = ‐ l… 0 …+l d. n = 2, l = ‐1, m = 1, m s = ‐½ not allowed: l = n‐1…..0 2. How many radial nodes are present for n = 4, l = 0? How many angular nodes? (10 pts) a. Radial Nodes: n – l – 1 = 4 – 0 – 1 = 3 radial nodes b. Angular Nodes: l = 0 angular nodes 3. The effective charges for nitrogen are: Z eff (1s) = 6.66, Z eff (2s) = 3.85, and Z eff (2p) = 3.83. Calculate the average distance of an electron from the nucleus in the 1s orbital. (10 pts) r n = n 2 a 0 Z eff ( n ) 1 + 1 2 1 ( + 1) n 2 r n = 1 2 (5.29*10 11 m ) 6.66 1 + 1 2 1 0(0 + 1) 1 2 = 1.19*10 11 m 4. The effective charges for carbon are: Z eff (1s) = 5.67, Z eff (2s) = 3.22, and Z eff (2p) = 3.14.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.
• Spring '11
• LIU
• EFF, me=9.109x1031kg mp=1.673x1027kg mn=1.675x1027kg, =q1q2/40r=Ze2/40r E=h=hc/ =h/mv=h/p, e=1.602x1019C F=ma J=Nm, Robert 20ADisc2K

{[ snackBarMessage ]}