DP Chemistry (first assessment 2025)

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Question 21N.2.SL.TZ0.a(i)

Date	November 2021	Marks available	[Maximum mark: 1]	Reference code	21N.2.SL.TZ0.a(i)
Level	SL	Paper	2	Time zone	TZ0
Command term	Sketch	Question number	a(i)	Adapted from	N/A

a(i).

[Maximum mark: 1]

21N.2.SL.TZ0.a(i)

Sketch the Lewis (electron dot) structure of the P₄ molecule, containing only single bonds.

[1]

Markscheme

Accept any diagram with each P joined to the other three.

Accept any combination of dots, crosses and lines.

Syllabus sections

Structure 2. Models of bonding and structure » Structure 2.2—The covalent model » Structure 2.2.4—The valence shell electron pair repulsion (VSEPR) model enables the shapes of molecules to be predicted from the repulsion of electron domains around a central atom. Predict the electron domain geometry and the molecular geometry for species with up to four electron domains.