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Question 23M.1.SL.TZ2.28

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1.SL.TZ2.28
Level SL Paper 1 Time zone TZ2
Command term Question number 28 Adapted from N/A
28.
[Maximum mark: 1]
23M.1.SL.TZ2.28

The following reaction is proposed for the collision of a proton p and a neutron n.

p + n → p + π0

The neutral pion π0 consists of an up quark and an anti-up quark.

Which conservation law does this equation violate?


A.  Baryon number

B.  Charge

C.  Lepton number

D.  Strangeness

[1]

Markscheme

A