It depends of the flavor of quark
Up-2 MeV/c^2 or 3.57 * 10^(-27) grams
Down-5 MeV/c^2 or 8.91 * 10^(-27) grams
Strange-104 MeV/c^2 or 1.85 * 10^(-25) grams
Charm-1.27 GeV/c^2 or 2.26 * 10^(-24) grams
Bottom-4.2 GeV/c^2 or 7.49 * 10^(-24) grams
Top-171.2 GeV/c^2 or 3.05 * 10^(-22) grams
The heaviest quark is a top Quark, then bottom quark, then Charm, strange, Down and the lightest is up
Quark.
A charm quark is an elementary particle with an electrical charge of +2⁄3 e. It's a second generation up-type quark and has a mass of about 1.5 GeV/c2.
Inside the nucleus there are protons and nutrons.further these consist of baryons.which contan three valence anti quarks.quarks are small dense objects moving around protons and neutrons. protons consist of 2 up quarks and one down quark.quarks are surrounded by gluons. neutrons consist of two down quark and one up quark. the decay of nutron is associated with quark transformation,in which down quark is converted to an up quark by weak attraction.
The heaviest element that is highly radioactive is Ununoctium, which has an atomic number of 118.
There are particles that weigh less than a quark, such as an electron, a neutrino, etc. But in terms of the volume of space that they occupy, no particle is smaller than a quark. Note that the concept of occupying space does not work exactly the same way on sub-atomic scales as it does on larger scales, due to quantum dynamic factors.Nothing, a quark is an infinitesimal point particle (as are photons, leptons, and neutrinos). Nothing can be smaller than a point.
I think the "Top" quark is probably the heaviest, which has a mass about that of 170 hydrogen atoms.
An anti-strange quark is an antiquark corresponding to the strange quark.
An anti-up quark is an antiquark which corresponds to the up quark.
An anti-beauty quark is an obsolete term for the anti-bottom quark.
Quark.
A Quark, is the smallest.
The final quark, the Top Quark, was discovered in 1995 at FermiLab.
quark quark
An antibottom quark is another name for the bottom antiquark, the antiparticle of the bottom quark.
Quark quark.
Quark Pharmaceuticals was created in 1993.
Quark - techfest - was created in 2006.