DP Chemistry (last assessment 2024)

Question 19M.2.hl.TZ2.4a

Date	May 2019	Marks available	[Maximum mark: 1]	Reference code	19M.2.hl.TZ2.4a
Level	hl	Paper	2	Time zone	TZ2
Command term	State	Question number	a	Adapted from	N/A

[Maximum mark: 1]

19M.2.hl.TZ2.4a

Rhenium, Re, was the last element with a stable isotope to be isolated.

(a)

The stable isotope of rhenium contains 110 neutrons.

State the nuclear symbol notation ${}_{\text{Z}}^{\text{A}}{\text{X}}$ for this isotope.

[1]

Markscheme

${}_{{\text{75}}}^{{\text{185}}}{\text{Re}}$ [✔]

Examiners report

It was expected that this question would be answered correctly by all HL candidates. However, many confused the A-Z positions or calculated very unusual numbers for A, sometimes even with decimals.

Syllabus sections

Core

Core » Topic 2: Atomic structure » 2.1 The nuclear atom

Core » Topic 2: Atomic structure

Question 19M.2.hl.TZ2.4a

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