Conservation Laws -- from Eric Weisstein's World of Physics

History and Terminology "> Conservation Laws v

Conservation Laws

: angular momentum: conserved if .
: baryon number: always conserved.
: charge: always conserved.
: color: always conserved.
: energy, classical: conserved in an elastic collision.
: energy/mass: conserved except on short time scales for which they may violate in accordance with the energy-time uncertainty principle.
: isospin: conserved in strong interactions.
: isospin Z component (): conserved in strong interactions.
: lepton numbers: all lepton numbers (, , ) are conserved.
: momentum, linear: conserved if and in inelastic collisions.
: strangeness number: conserved in strong interactions, in weak interactions.