For dichromate dianion. Which of the following property is incorrect?

Due to resonance the terminal Cr-O bonds are get double bond character and becomes shorter than bridge bonds. In the formation of dichromate dianion two tetrahedral $Cr{O}_4^{2-}$ ions condense through oxygen atom. The O-Cr-O bond angle is less since the bond pair electrons move towards more electronegative oxygen. The hybridization of chromium in the formation of $Cr{O}_4^{2-}\text{\hspace{0.17em}\hspace{0.17em}or\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}}C{r}_2{O}_7^{-2}$ is  $d^{3}s$