Changes

'''Protons''' are one of the two types of [[sub-atomic]] particles that form in the [[nucleus]] of an [[atom]] (together with [[neutron]]s).<ref>Serway, Beichner: ''Physics for Scientists and Engineers'', 5th edition</ref>. Proton, a term which originates from the greek "protos", meaning "first", is a positively charged particle that exemplifies the theory of containement, and is one that exists due to the mediation of the strong nuclear force by [[gluon]]s and [[electron]]s. Protons also exert an electrostatic attraction to [[electron]]s, leading of course to the presence of orbitals, shells and electron promotion in the d-block (a property which makes [[transitional]] compounds colored). 

'''Protons''' are one of the two types of [[sub-atomic]] particles that form in the [[nucleus]] of an [[atom]] (together with [[neutron]]s).<ref>Serway, Beichner: ''Physics for Scientists and Engineers'', 5th edition</ref>

A proton is made up of two up [[quark]]s and one down quark.  According to the [[Standard Model]] of particle physics, quarks are [[fundamental particle]]s, meaning that they cannot be split into smaller particles.<ref>Krane: ''Modern Physics'', 2nd edition</ref>

A proton is made up of two up [[quark]]s and one down quark.  According to the [[Standard Model]] of particle physics, quarks are [[fundamental particle]]s, meaning that they cannot be split into smaller particles.<ref>Krane: ''Modern Physics'', 2nd edition</ref>

==Properties==

==Properties==

*Mass: 1.5126231*10^-27 [[kilogram|kg]]

*Mass: 1.6726231*10^-27 [[kilogram|kg]]

*Charge: 1.60218925*10^-19 [[MilliCouloumb|mC]]

*Charge: 1.60218925*10^-19 [[Couloumb|C]]

==References==

==References==