Subatomic Particles Quiz

Given the clues, can you name these important subatomic particles within the Standard Model?

Subatomic particles discovered as of February 2020.

Source: Wikipedia

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Last updated: May 23, 2020

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First submitted	August 14, 2018
Times taken	496
Average score	57.9%
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Symbol	Composition	Year Discovered	Particle
e⁻	elementary (lepton)	1897 (Thomson)	electron
α	composite (atomic nucleus)	1899 (Rutherford)	alpha particle
γ	elementary (quantum)	1905 (Einstein)	photon
p	composite (baryon)	1919 (Rutherford)	proton
n	composite (baryon)	1932 (Chadwick)	neutron
e⁺, et al.	—	1932 (Anderson)	antiparticles
π	composite (mesons)	1947 (Lattes, Occhialini and Powell)	pion
μ⁻	elementary (lepton)	1936 (Anderson)	muon
K	composite (mesons)	1947	kaon
Λ⁰, et al.	composite (baryons)	1950 (University of Melbourne)	lambda baryons
ν_e, et al.	elementary (lepton)	1956 (Cowan and Reines)	neutrinos
u, d, s	elementary model	1964 (Gell-Mann and Zweig)	quarks
c	elementary (quark)	1974	charm quark
b	elementary (quark)	1977	bottom quark
W^±, Z⁰	elementary (quantum)	1983 (CERN)	weak bosons
t	elementary (quark)	1995	top quark
—	elementary (quantum)	2012 (CERN)	Higgs boson
Z_c(3900), et al.	composite	2013	tetraquark
—	composite	2019 (CERN)	pentaquark

Level 56

Jul 16, 2021

Great quiz, always love to see physics based quizzes. Would it be fair to accept gamma for photons? Especially considering the symbol.

Level 95

Jul 16, 2021

Thanks for the comment. I am glad you enjoyed the quiz.

I appreciate your suggestion regarding 'gamma', but within physics, the 'γ' is used to describe photons as a whole and not merely gamma rays (the 1905 discovery of photons by Einstein should be sufficient to lead to 'photons', while gamma rays—discovered by Rutherford in 1900 and which, admittedly, also use the 'γ' symbol—are not a larger class of elementary subatomic particles).

Level 77

Dec 7, 2021

An alpha particle is not subatomic.

Level 95

Dec 7, 2021

An alpha particle is subatomic in that it is smaller than at atom, being a composite particle (a doubly ionized helium nucleus). It is true that 'alpha particle' is not defined especially rigorously, but for the purposes of this quiz (and Rutherford's discovery/Rutherford and Royds' proof in 1907), an alpha particle is subatomic.

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