DP Chemistry (first assessment 2025)

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Question 19M.1A.SL.TZ2.4

Date	May 2019	Marks available	[Maximum mark: 1]	Reference code	19M.1A.SL.TZ2.4
Level	SL	Paper	1A	Time zone	TZ2
Command term		Question number	4	Adapted from	N/A

4.

[Maximum mark: 1]

19M.1A.SL.TZ2.4

Which is correct for ${}_{16}^{34}{{\text{S}}^{2 - }}$ ?

[1]

Markscheme

D

Examiners report

93 % of the candidates deduced the correct numbers of protons, neutrons and electrons in the sulfide ion.

Syllabus sections

Structure 1. Models of the particulate nature of matter » Structure 1.2—The nuclear atom » Structure 1.2.1 - Atoms and negatively charged electrons. Atoms contain a positively charged, dense nucleus composed of protons and neutrons (nucleons). Negatively charged electrons occupy the space outside the nucleus. Use the nuclear symbol ZXA to deduce the number of protons, neutrons and electrons in atoms and ions.