DP Chemistry (first assessment 2025)

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Question 19M.2.SL.TZ1.6a

Date	May 2019	Marks available	[Maximum mark: 1]	Reference code	19M.2.SL.TZ1.6a
Level	SL	Paper	2	Time zone	TZ1
Command term	State	Question number	a	Adapted from	N/A

a.

[Maximum mark: 1]

19M.2.SL.TZ1.6a

(a)

State the nuclear symbol notation, ${}_{\text{Z}}^{\text{A}}{\text{X}}$ , for iron-54.

[1]

Markscheme

${}_{{\text{26}}}^{{\text{54}}}{\text{Fe}}$ [✔]

Examiners report

The nuclear symbol notation was generally correct. However, some students swapped atomic and mass numbers and hence lost the mark.

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.