Frequently used physical and Constants for GRE

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Frequently used constants:

Frequently Asked Constants
Frequently asked constants

Constant

Symbol

Value

Alpha particle mass

Avogadro constant

Boltzmann constant

Electron mass

Electron volt

Electronic charge

Faraday constant

Gravitational constant

Neutron mass

Permeability of free space

Permittivity of free space

Planck constant

Proton mass

Proton-electron mass ratio

Speed of light

Universal gas constant

Particle physics:

Particle Physics
particle physics

Class

Name

Symbol

Mass

Mean life

Year of discovery

Leptons

Electron

Neutrino

Muon

Tau

1

207

3500

Stable

Stable

1897

1957

1937

1975

Mesons

Pi meson

K meson

273

264

≈970

?

1947

1947

1947

Baryons

Proton

Neutron

Lambda

Sigma

Chi

omega

1836

1839

2183

2327

2573

3272

1897

1932

1947

1953

1954

1964