Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry
Atoms, molecules and stoichiometry — practice question
Valence Shell Electron Pair Repulsion theory (VSEPR) is a model for repulsion between electron pairs, including lone pairs, that can be used to work out the shapes of, and bond angles in, simple molecules.
(a)[3]
Use simple hydrogen-containing compounds to complete the table below. One example is already shown.
(b(i))
Draw a ‘dot-and-cross’ diagram for the $\text{TeF}_6$ molecule, showing only the outer electrons.
(b(ii))
What shape will the $\text{TeF}_6$ molecule have?
(b(iii))[3]
What is the $\text{F-Te-F}$ bond angle in $\text{TeF}_6$?
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “3 bond pairs and 0 lone pairs; trigonal planar; example $BH_3$” …