• Baryon number: B
• Lepton number: L
• Strangeness: S
• Charmness: C
• Bottomness: B′
• Topness: T
• Isospin: I or I₃
• Weak isospin: T or T₃
• Electric charge: Q

Combinations:

• Hypercharge: Y
  • Y = (B + S + C + B′ + T)
  • Y = 2 (Q − I₃)
• Weak hypercharge: Y_W
  • Y_W = 2 (Q − T₃)
  • X + 2Y_W = 5 (B − L)

Flavour mixing

• CKM matrix
• PMNS matrix
• Flavour complementarity