20,345
edits
Changes
→About Up-quarks
An '''down-quark''' is a type of [[quark]] with a [[Electrical Charge|charge]] of <math>-\frac{1}{3}</math>.
===About UpDown-quarks===
: There are two '''down-quarks''' in a [[neutron]] and only one '''down-quark''' in a [[proton]].