Question 13
Question 13 of 40
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Periodic Table
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
3. Chemical bonding
3.5. Shapes of molecules

state and explain the shapes of, and bond angles in, molecules by using VSEPR theory, including as simple examples: • BF\(_3\) (trigonal planar, 120°) • CO\(_2\) (linear, 180°) • CH\(_4\) (tetrahedral, 109.5°) • NH\(_3\) (pyramidal, 107°) • H\(_2\)O (non-linear, 104.5°) • SF\(_6\) (octahedral, 90°) • PF\(_5\) (trigonal bipyramidal, 120° and 90°)

3. Chemical bonding
3.7. Dot-and-cross diagrams

use dot-and-cross diagrams to illustrate ionic, covalent and coordinate bonding including the representation of any compounds stated in 3.4 and 3.5 (dot-and-cross diagrams may include species with atoms which have an expanded octet or species with an odd number of electrons)