3.5. Shapes of molecules
A subsection of Chemistry, 9701, through 3. Chemical bonding
Listing 10 of 33 questions
Valence Shell Electron Pair Repulsion theory (VSEPR) is a model of electron-pair repulsion (including lone pairs) that can be used to deduce the shapes of, and bond angles in, simple molecules. Complete the table below by using simple hydrogen-containing compounds. One example has been included. number of bond pairs number of lone pairs shape of molecule formula of a molecule with this shape trigonal planar BH3 Tellurium, Te, proton number 52, is used in photovoltaic cells. When fl uorine gas is passed over tellurium at 150 °C, the colourless gas TeF6 is formed. Draw a ‘dot-and-cross’ diagram of the TeF6 molecule, showing outer electrons only. What will be the shape of the TeF6 molecule? What is the F–Te–F bond angle in TeF6?
9701_w13_qp_21
THEORY
2013
Paper 2, Variant 1
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Valence Shell Electron Pair Repulsion theory (VSEPR) is a model of electron-pair repulsion (including lone pairs) that can be used to deduce the shapes of, and bond angles in, simple molecules. Complete the table below by using simple hydrogen-containing compounds. One example has been included. number of bond pairs number of lone pairs shape of molecule formula of a molecule with this shape trigonal planar BH3 Tellurium, Te, proton number 52, is used in photovoltaic cells. When fl uorine gas is passed over tellurium at 150 °C, the colourless gas TeF6 is formed. Draw a ‘dot-and-cross’ diagram of the TeF6 molecule, showing outer electrons only. What will be the shape of the TeF6 molecule? What is the F–Te–F bond angle in TeF6?
9701_w13_qp_22
THEORY
2013
Paper 2, Variant 2
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Questions Discovered
33