Questions 6 - T refer to the following plot of radial probability ditributions f
ID: 591845 • Letter: Q
Question
Questions 6 - T refer to the following plot of radial probability ditributions for the 3s, 3p, and 3d orbitals. 1,4 -3s -3d 0.8 0.6 04 02 10 15 202 Distance from Nucleus (Atomic Units) 6. Which orbital has the largest number of radial nodes? a. 3s b. 3p c. 3d d. Cannot be determined 7. Why is the 3s orbitals lower in energy than the 3p and 3d orbitals? a. The electron in the 3s orbital is farther from the nucleus on average b. The electron in the 3s orbital is closer from the nucleus on average c. The electron in the 3s orbital can penetrate closer to the nucleus d. The electron in the 3s orbital cannot penetrate closer to the nucleus 8. Which of the following elements has the most negative (most exothermic) elec- tron affinity? a. Cl b. Ne C. As d. Mg 9. All of the following statements about the Bohr Model are true except: a. Electrons move in orbits around the nuclews b. As n increases, the size of the orbit decreases c. Electrons cannot exist between orbits d. As n increases, the energy of the orbit increases Page 3Explanation / Answer
6) answer a) 3s
node is the point at which probability of finding an electron is zero
radial nodes can be calculated as follows
no of node = n-1
no of radial node = n - l-1
for 3s orbital
no of radial node = 3-0-1=2
for 3p orbital
no of radial node = 3 - 1-1 =1
for 3d orbital
no of radial node = 3-2-1=0
7) answer c) electron is 3s orbital can penetrate closer to the nucleus
8) answer a)Cl
9) answer b) as n increases, the size of the orbit decreases
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