Because nuclei are much heavier than electrons, one can separately solve Schrodi

Question

Because nuclei are much heavier than electrons, one can separately solve Schrodinger equations of electrons and nuclei. This is a statement of A. Pauli exclusion principle B. Hund rule C. Bohr's theory 1. r approximation 2. How many normal vibrational modes (or vibrational degree of freedom) does CH,CI have? A) 15 B) 12 C)9 D) 10 3. Provided that SO, has no pure rotational spectrum, which is the most possible molecular structure for SO.? ) Linear S-0-0 B) Linear O-S-OBent $-O-O D) Bent O-S-O A)3 B) 2 C)2.5 D) 1.5 A) N2-N2 B) N2>N C)N2

Explanation / Answer

1. option D: Bohr Oppenheimer approximation

2. option C: 9 modes

3. Option D: bent O-S-O

4. option C: 2.5 = (9-4)/2 = 2.5 ((no. of electrons in antibonding)-(no. of electrons in bonding))/2

5. option A: N2=N2+ because both have bond order of 2.5

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