DP Chemistry (first assessment 2025)

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Question 19M.2.SL.TZ1.5c(i)

Date	May 2019	Marks available	[Maximum mark: 1]	Reference code	19M.2.SL.TZ1.5c(i)
Level	SL	Paper	2	Time zone	TZ1
Command term	Draw	Question number	c(i)	Adapted from	N/A

c(i).

[Maximum mark: 1]

19M.2.SL.TZ1.5c(i)

(c(i))

Draw a Lewis (electron dot) structure of chloramine.

[1]

Markscheme

[✔]

Note: Accept any combination of dots/crosses or lines to represent electron pairs.

Examiners report

The Lewis structure of chloramine was correct for strong candidates, but many made the mistake of omitting electron pairs on N and Cl.

Syllabus sections

Structure 2. Models of bonding and structure » Structure 2.2—The covalent model » Structure 2.2.1—A covalent bond is formed by the electrostatic attraction between a shared pair of electrons and the positively charged nuclei. The octet rule refers to the tendency of atoms to gain a valence shell with a total of 8 electrons. Deduce the Lewis formula of molecules and ions for up to four electron pairs on each atom.