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===About Fundamental Forces===
: The '''fundamental forces''' can cause [[particle]]s to change direction or change from one [[particle]] into another.
: During the interactions caused by '''fundamental forces''' certain properties of [[particle]]s are conserved, including [[Conservation of Baryon Number|baryon number]], [[Conservation of Lepton Number|lepton number]], [[Electrical Charge|charge]] and [[strangeness]] (which is conserved in the [[Strong Nuclear Interaction|strong interaction]] but not conserved in the [[Weak Nuclear Interaction|weak interaction]]).
: The four '''fundamental forces''' are:
:*[[Strong Nuclear Force]] - Experienced only by [[hadron]]s and responsible for holding [[quark]]s together and holding [[proton]]s and [[neutron]]s together in the [[Atomic Nucleus|atomic nucleus]].