The radial wavefunction determines orbital size (the distance that electron dens
ID: 510118 • 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. If any electrons are found in antibonding orbital(s), it means that no bond will form between atoms of that particular molecule b. When two orbitals overlap in-phase with each other, a bonding molecular orbital forms. c. When two orbitals overlap out-of-phase with each other, an antibonding molecular orbital forms. d. All antibonding MOs are higher in energy than the atomic orbitals of which they are composed The molecule XCls - has a square pyramidal shape. Which of the following atoms could be X? a. O b. P c. S d. Xe e. At least two of these atoms could be X.Explanation / Answer
Q 21 The molecule XCl5. – has a square pyramidal shape. Which of the following atoms could be X?
answer c. S
n XCl5, the central atom has 5bond pairs and 1 lone pair of electrons.
Considering there is an extra electronin XCl5, X atom in free state has6 valence electrons.
All of O, S and P would have 6 valence electrons.
However,O cannot expands its octet.
Therefore, Xcan be S
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Q 20. answer option A
Antibonding MOs have electron density mainly outside the space between the two nuclei. All antibonding MOs are higher in energy than the atomic orbitals of which they are composed.-CORRECT
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Q19 . answer option B
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