AQA A Level Physics 3.2.1.7 Applications of conservation laws

What is conserved in all particle interactions?

• Energy

• Momentum

• Strangeness

What is conserved in all particle interactions?

• Baryon number

• Charge

• Strangeness

What is conserved in all particle interactions?

• Lepton number

• Energy

• Strangeness

What is conserved in all strong interactions?

• Lepton number

• Energy

• Strangeness

• Baryon number

What is conserved in all strong interactions?

• Charge

• Momentum

• Strangeness

What is NOT conserved in weak interactions?

• Lepton number

• Baryon number

• Strangeness

• Momentum

• Charge

What changes during β-decay?

• Lepton number

• Baryon number

• Quark composition

• Strangeness

Baryon number of a proton

• 1

• 0

• -1

Baryon number of a neutron

• 1

• 0

• -1

Baryon number of an electron

• 1

• 0

• -1