What is Up quark?
'''Up quarks''' are [[subatomic particle]]s that help make up many [[Composite particle|larger particle]]s, such as [[proton]]s. Up quarks have a [[Electromagnetism|charge]] of +2/3, and are the lightest of the six types of [[quarks]]. Up quarks have a [[Spin (physics)|spin]] of 1/2, which is the spin all [[fermion]]s have. They are affected by all four of the [[fundamental force]]s, which are [[gravity]], the [[strong force]], the [[weak force]], and [[electromagnetism]]. Up quarks are [[elementary particle]]s, similar to all other quarks. This means that they are so small that scientists believe that they can not be divided any more. The [[antiparticle]] of the up quark is kown as the '''up antiquark''' (sometimes called ''antiup quark''), which differs some of its properties from each other, such as [[electric charge|charge]] have [[additive inverse|equal magnitude but with opposite sign]]. [[Proton]]s (which have a total charge of +1) are made of two up quarks (which have a charge of +2/3) and one [[down quark]] (which has a charge of -1/3). Neutrons (which have a total charge of zero) are made of one '''up quark''', and two down quarks. Up quarks can also be used to create more [[Meson|complex particles]], such as [[pion]]s. {{elementary}} {{physics-stub}} [[Category:Quarks]]