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==Key Stage 5==
===Meaning===
An '''up-quark''' ('''u''') is a type of [[quark]] with a [[Electrical Charge|charge]] of <math>+\frac{2}{3}</math>.
===About Up-quarks===
: The '''up-quark''' is denoted with a lower case '''u'''.
: There are two '''up-quarks''' in a [[proton]] and only one '''up-quark''' in a [[neutron]].
| style="height:20px; width:120px; text-align:center;"|
[[Up-quark]]
| style="height:20px; width:120px; text-align:center;"|<math>qQ=+\frac{2}{3}</math>
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math>
| style="height:20px; width:120px; text-align:center;"|<math>B=+\frac{1}{3}</math>
| style="height:20px; width:120px; text-align:center;"|
[[Antiup-quark]]
| style="height:20px; width:120px; text-align:center;"|<math>qQ=-\frac{2}{3}</math>
| style="height:20px; width:120px; text-align:center;"|<math>S=0</math>
| style="height:20px; width:120px; text-align:center;"|<math>B=-\frac{1}{3}</math>
| style="height:20px; width:120px; text-align:center;"|<math>L=0</math>
|}