Question & Answer: A certain element, X, forms the fluoride XF_3, and XF_5. Element X also reacts with sodium…..

A certain element, X, forms the fluoride XF_3, and XF_5. Element X also reacts with sodium to form Na_3X. (a) Give the symbol of an element that behaves in this way. (b) For both XF_3 and XF_5: (i) write Lewis electron dot structures (ii) describe both the electron pair and molecular geometries (iii) give the type of hybridization of the X atom (c) The bonds in XF_5 are not all the same length. Identify the longer bonds and account for this behavior. (d) Another element, Y, in the same family(group) as X forms YF_3, but not YF_5. Identify element Y and account for its inability.