DP Chemistry (last assessment 2024)

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Question 17N.2.sl.TZ0.a

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Date November 2017 Marks available [Maximum mark: 4] Reference code 17N.2.sl.TZ0.a
Level sl Paper 2 Time zone TZ0
Command term Deduce, Draw Question number a Adapted from N/A
a.
[Maximum mark: 4]
17N.2.sl.TZ0.a

Lewis (electron dot) structures are useful models.

Draw the Lewis (electron dot) structures of PF3 and PF4+ and use the VSEPR theory to deduce the molecular geometry of each species.

[4]

Markscheme

Accept any combination of dots, crosses and lines.

Ignore missing brackets and positive charge.

Penalize missing lone pairs once only.

Do not apply ECF for molecular geometry.

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