The radial Wavefunction determines orbital size (the distance that electron dens
ID: 508313 • Letter: T
Question
The radial Wavefunction determines orbital size (the distance that electron density spreads from the nucleus).Each radial distribution curve below show both orbital size and number of radial nodes for a particular atomic orbital. Select the correct curve for 3s orbital. Which of the following statements is wrong? a. When two orbitals overlap in-phase with each other, a bonding molecular orbital forms. b. When two orbitals overlap out-of-phase with each other, an antibonding molecular orbital forms. c. If any electrons are found in antibonding orbital(s), it means that no bond will form between atoms of that particular molecule d. All antibonding MOs are higher in energy than the atomic orbitals of which they are composed The molecule XCl_s^- has a square pyramidal shape. Which of the following atoms could be X? a. 0 b. P c. Xe d. S e. At least two of these atoms could be X.Explanation / Answer
19) option B
The radial distibution curves of s orbitals have number of peaks = n (prinicipal quantium number ) and number of minima = number of radial nodes = (n-1)
20) option C is wrong statement
The presence of antibonding electrons does not imply no bond.
If the number of electrons present in anti bonding molecular orbitals are equal to bonding molecular orbitals, then no bond is formed.
21)option D
SCl5- ion has 5 bonded electron pairs and one lone pair of electrons
S has 6 vlence electrons+ 5 from five Cl + one extra electron from negative charge = 12 .
Thus 5 bp and 1 lp, on central atom, the electron pair geometry is octhedral and molecular geometry is square pyramidal.
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