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Question 22M.2.HL.TZ2.9b

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Date May 2022 Marks available [Maximum mark: 4] Reference code 22M.2.HL.TZ2.9b
Level HL Paper 2 Time zone TZ2
Command term Estimate, State Question number b Adapted from N/A
b.
[Maximum mark: 4]
22M.2.HL.TZ2.9b

In an experiment a beam of electrons with energy 440 MeV are incident on oxygen-16 O816 nuclei. The variation with scattering angle of the relative intensity of the scattered electrons is shown.

(b)

Estimate, using the result in (a)(iii), the volume of a tin-118 Sn50118 nucleus. State your answer to an appropriate number of significant figures.

[4]

Markscheme

ALTERNATIVE 1

use of R∝A13   OR  V∝A ✓

volume of Sn=43πASnAOrO 3 or equivalent working ✓

2.3 to 2.5 × 10-43 «m3»✓

answer to 1 or 2sf ✓

 

ALTERNATIVE 2

use of R=Ro×A13 ✓

volume of Sn=43πR3  OR  5.9 x 10-15 seen ✓

8.5 × 10-43 «m3»✓

answer to 1 or 2sf ✓

 

Although the question expects candidates to work from the oxygen radius found, allow ALT 2 working from the Fermi radius.

MP4 is for any answer stated to 1 or 2 significant figures.

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