DP Physics (last assessment 2024)

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Question 20N.3.HL.TZ0.23

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Date November 2020 Marks available [Maximum mark: 2] Reference code 20N.3.HL.TZ0.23
Level HL Paper 3 Time zone TZ0
Command term Describe Question number 23 Adapted from N/A
23.
[Maximum mark: 2]
20N.3.HL.TZ0.23

In 2017, two neutron stars were observed to merge, forming a black hole. The material released included chemical elements produced by the r process of neutron capture. Describe two characteristics of the elements produced by the r process.

[2]

Markscheme

higher atomic number than iron ✓

excess of neutrons ✓

radioactive/undergoing beta decay ✓

 

Allow heavier than iron for MP1

Examiners report

The rapid process proved to be known by many although fewer candidates were able to provide two characteristics.

Syllabus sections