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IB Diploma Chemistry Mastery Hub: The Industry Foundation Pr

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Q1Domain Verified
Within the context of quantum mechanics and atomic orbitals, which of the following statements best describes the relationship between the principal quantum number ($n$) and the radial probability distribution function for an electron in a hydrogen atom?
As $n$ increases, the radial probability distribution function exhibits more nodes and the most probable distance of the electron from the nucleus decreases.
The radial probability distribution function is independent of $n$, as electron energy is solely determined by the azimuthal quantum number.
The number of nodes in the radial probability distribution function is equal to $n$, and the most probable distance increases with increasing $n$.
The radial probability distribution function is a single, sharp peak for all values of $n$, indicating a fixed distance from the nucleus.
Q2Domain Verified
Considering the concept of isoelectronic species and their ionic radii, which of the following sets of ions are isoelectronic and ordered correctly by decreasing ionic radius?
$\text{N}^{3-}$, $\text{O}^{2-}$, $\text{F}^{-}$, $\text{Ne}$
$\text{Li}^{+}$, $\text{Be}^{2+}$, $\text{B}^{3+}$, $\text{C}^{4+}$
$\text{O}^{2-}$, $\text{F}^{-}$, $\text{Na}^{+}$, $\text{Mg}^{2+}$
$\text{S}^{2-}$, $\text{Cl}^{-}$, $\text{K}^{+}$, $\text{Ca}^{2+}$
Q3Domain Verified
In the context of atomic orbital hybridization, which of the following molecules would exhibit $sp^3d^2$ hybridization for its central atom, leading to an octahedral electron geometry?
$\text{PCl}_5$
$\text{SF}_6$
$\text{BrF}_3$
$\text{XeF}_4$

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