Module 6 - 6.4.2 Fundamental Particles

Question 1

Fundamental Particles are (definition)

Answer 1

particles that cannot be broken down into smaller components

Question 2

Things that are always conserved (6)

Answer 2

• momentum
• mass-energy
• charge
• strangeness
• Baryon number
• Lepton number

Question 3

Hadrons are (definition)

Answer 3

particles consisting of a combination of quarks to give a whole number charge

Question 4

All particles made of quarks are called

Answer 4

Hadrons

Question 5

Baryons have
(+ Baryon no.)

Answer 5

3 quarks
(Baryon no. of 1 or -1)

Question 6

Mesons have
(+ Baryon no.)

Answer 6

2 quarks
(Baryon no. of 0)
(consist of 1 matter and 1 antimatter)

Question 7

Leptons are
(+ examples)

Answer 7

• fundamental particles
• electrons and neutrinos

Question 8

When matter interacts with its antimatter equivalent

Answer 8

annihilation occurs as their combined mass is converted into energy

Question 9

The Weak Nuclear Force (3)

Answer 9

• felt by both quarks and leptons
• can change quarks or leptons from one type to another
• is responsible for beta decay

Question 10

Hadrons experience …
Leptons experience …
(Strong and Weak)

Answer 10

Hadrons: strong and weak
Leptons: weak

Question 11

Baryon no for quarks and antiquarks

Answer 11

Quarks: 1/3
Antiquarks: -1/3

Question 12

Quarks Strangeness value

Answer 12

Strange quark: -1
Anti-strange quark: 1
All other: 0

Question 13

Lepton Charge Values

Answer 13

Electron, Muon, Tauon: -e
Positron, Anti Muon, Anti Tauon: +e
All neutrinos: 0

Question 14

Lepton Number for Leptons

Answer 14

Leptons: 1
Anti Leptons: -1