Predict the bond order of the NO⁺ molecular ion. A)2 B)2.5 C)3 D)1 E)1.5

Question

Quizplus · Accepted Answer

To determine the bond order of the molecular ion, we need to calculate the number of bonds between the atoms and subtract the number of antibonding electrons from the bonding electrons, then divide by 2. For NOF1F1F1S1^F1F1F10, we have: - N-O: one bond - O-F: one bond - F-F: one bond - F-S: one bond - S-U: one bond - U-P: one bond - P-S: one bond - F-F: one bond Total number of bonds = 8 Now, we need to count the bonding and antibonding electrons. Since this is a molecular ion, we need to add or subtract electrons to/from the neutral molecule to get the ion. The neutral molecule is NOF1F1F1S1F1F1F10 which has a total of 56 valence electrons: - N: 5 - O: 6 - F: 7 (x4) - S: 6 (x2) - U: 6 - P: 5 The ion has a +1 charge, which means it has lost one electron. So, we subtract one electron from the total, giving us 55 valence electrons. To determine the number of bonding and antibonding electrons, we need to fill the electrons in the molecular orbitals according to the aufbau principle and Hund's rule. We then fill the antibonding orbitals from the highest energy level downwards. We can represent the molecular orbitals as: σ(1s)σ*(1s) σ(2s)σ*(2s) σ(2p)π(2p)x2σ*(2p) σ(3s)σ*(3s) σ(3p)π(3p)x2σ*(3p) π(4p)x4σ*(4p) The electrons fill the orbitals as follows: 1s: 2 electrons (bonding) 2s: 2 electrons (bonding) 2p: 4 electrons (2 bonding and 2 antibonding) 3s: 2 electrons (bonding) 3p: 6 electrons (4 bonding and 2 antibonding) 4p: 3 electrons (3 bonding) Total number of bonding electrons = 15 Total number of antibonding electrons = 4 Bond order = (number of bonding electrons - number of antibonding electrons)/2 Bond order = (15 - 4)/2 Bond order = 5.5/2 Bond order = 2.75 However, we need to remember that bond order must be a whole number. We need to round up or down depending on the situation. In this case, since the bond order is closer to 3 than 2, the best choice is (C) 3.

Predict the Bond Order of the NO+ Molecular Ion

Predict the Bond Order of the NO⁺ Molecular Ion