Beta version

BETA TEST VERSION OF THIS ITEM
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Historical treat as elementary

Particle	Symbol	Mass [kg]	Relative mass [u]	Charge [c]	Relative charge
Proton	$p,\ H$	1.672614×10^-27	1.00727661	1.6726×10^-19	1
Neutron	$n,\ _{0}^{1}n$	1.67492×10^-27	1.0086652	0	0
Electron	$e,\ \beta^-,\ ^{\ 0}_{-1}n$	9.109558×10^-31	0.000548593	1.60219×10^-19	-1

Leptons

Particle	Symbol	Mass [MeV]	Life time [s]	Relative charge
Electron	$n_e$	$0.511$	$\text{stable}$	-1
Electron neutrino	$e$	$<7.3\times 10^{-6}$	$\text{stable}$	0
Mion	$m$	$105.66$	$2.197\times 10^{-6}$	-1
Mion neutrino	$n_m$	$<0.25$	$\text{stable}$	0
Tau	$t$	$1784.1$	$3.1\times 10^{-13}$	-1
Tau neutrino	$n_t$	$<70$	$\text{stable}$	0

Quarks

Particle	Symbol	Mass [GeV/c²]	Relative charge
Quark up	$u$	$0.002 \div 0.008$	2/3
Quark down	$d$	$0.005 \div 0.015$	-1/3
Quark strange	$s$	$100 \div 300$	-1/3
Quark charm	$c$	$1.3 \div 1.7$	2/3
Quark beauty	$b$	$4.7 \div 5.3$	-1/3
Quark truth	$t$	$>170$	2/3

Mesons

Particle	Symbol	Mass [MeV]	Life time [s]
Charged pion	$p^{+}, p^{-}$	$139.57$	$2.6 \times 10^{-8}$
Neutral pion	$p^{0}$	$134.98$	$0.8 \times 10^{-16}$
Charged caon	$K^{+}, K^{-}$	$493.68$	$1.2 \times 10^{-8}$
Neutral caon	$K^0, \widetilde{K}^0$	$497.67$	$0.9 \times 10^{-10} \div 5.2 \times 10^{-8}$
Meson h	$h^0$	$547.30$	$2.4 \times 10^{-19}$

Barions

Particle	Symbol	Mass [MeV]	Life time [s]
Proton	$p, \widetilde{p}$	$938.27$	$\text{stable}$
Neutron	$n, \widetilde{n}$	$939.56$	$0.9 \times 10^3$
Hiperon Λ	$\Lambda, \widetilde{\Lambda}$	$1115.68$	$2.6 \times 10^{-10}$
Hiperon Σ⁺	$\Sigma^{+}, \widetilde{\Sigma}^{+}$	$1189.37$	$0.8 \times 10^{-10}$
Hiperon S⁰	$S^0, \widetilde{\Sigma}^{0}$	$1192.64$	$7.4 \times 10^{-20}$
Hiperon Σ−	$\Sigma^{-}, \widetilde{\Sigma}^{-}$	$1197.45$	$1.5 \times 10^{-10}$
Hiperon Ξ⁰	$\Xi^0, \widetilde{\Xi}^0$	$1314.9$	$2.9 \times 10^{-10}$
Hiperon Ξ^-	$\Xi^-, \widetilde{\Xi}^-$	$1321.32$	$1,6 \times 10^{-10}$
Hiperon Ω^-	$\Omega^-, \widetilde{\Omega}^-$	$1672.45$	$0.8 \times 10^{-10}$

Some facts

Historically, elementary particles were such objects that have no known internal structure that is, colloquially speaking they are indivisible.
With the development of science, particles that were formerly considered indivisible turned out to be assembled from two or more other, smaller particles. Thus, they ceased to be elementary in a literal sense.
Currently, elementary particles are used interchangeably with the concept of subatomic particles, i.e. those that are "more elementary", "smaller" than the atom.
Traditionally, the elementary particles that make up the atoms are:
- proton - positively charged particle being part of the atomic nucleus,
- neutron - particle with a mass similar to proton, however without electric charge ,
- electron - a particle with a negligible mass (in comparison with proton mass) with negative electric charge.
The inert composite atom is of N protons, the same number of electrons and a certain number of neutrons. Because the numbers of electrons and protons in the atom are identical, their charges are balanced and the atom as a whole is electrically neutral.
Atoms that differ only in the amount of neutrons are called isotopes .
The science department that deals with the study of elementary particles is elementary particle physics.
Currently, as many as several hundred of various elementary particles are known. We consider quarks, leptons and bosons transmitting interactions to be "truly" elemental (i.e. without internal structure).
Elementary particles can be divided into stable and unstable. The currently known permanent particles are: proton, electron, all neutrinos and photon.

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