Question #44156

Consider the isoelectronic and isostructural tetrahedral oxyanions $\ce{MoO4^{2-}}$ and $\ce{WO4^{2-}}$ in aqueous medium at $298\text{ K}$. Evaluate the following four statements regarding their bonding characteristics and thermodynamic properties:

I. The formal resonance bond order of the $\ce{M-O}$ bond in both $\ce{MoO4^{2-}}$ and $\ce{WO4^{2-}}$ is $1.5$. II. Experimentally, the bond length $d_{\ce{W-O}}$ is approximately equal to $d_{\ce{Mo-O}}$, which is shorter than expected from standard group trends due to the Lanthanide contraction. III. The $\ce{W-O}$ bond exhibits stronger $d\pi-p\pi$ overlap and greater covalent character than the $\ce{Mo-O}$ bond due to the relativistic expansion of the $5d$ orbitals. IV. $\ce{WO4^{2-}}$ is a stronger oxidizing agent than $\ce{MoO4^{2-}}$ because the Lanthanide contraction drastically reduces the stability of the $+6$ oxidation state in Tungsten.

How many of the above statements are correct?