1.7 Particles and Nuclear Structure

Question 1

What are the two groups of elementary particles?

Answer 1

Quarks and Leptons

Question 2

Are quarks high or light weight particle’s?

Answer 2

They are high mass particles

Question 3

Are leptons high or light weight particle’s?

Answer 3

They are Light Weight particles

Question 4

What are the two types of leptons

Answer 4

Electrons, Electron Neutrino

Question 5

Quarks are either … type or … type

Answer 5

Up
Down

Question 6

Have Quarks ever been seen alone?

Answer 6

No

Question 7

Baryons are made of … quarks

Answer 7

3

Question 8

Mesons are made of a pair of … and …

Answer 8

Quarks
Anti-quarks

Question 9

Baryons and Mesons are types of …

Answer 9

Hadrons

Question 10

For each particle that exists there is an … particle

Answer 10

Anti

Question 11

Antiparticles have the same … but opposite …

Answer 11

Mass
Charges

Question 12

Up quarks have a … charge

Answer 12

+2/3

Question 13

Down Quarks have a … charge

Answer 13

-1/3

Question 14

Anti-up quarks have a … charge

Answer 14

-2/3

Question 15

Anti-down quarks have a … charge

Answer 15

+1/3

Question 16

When quarks form a group of three they are called …

Answer 16

Baryons

Question 17

What are the four combinations of up and down quarks?

Answer 17

uud
udd
uuu
ddd

Question 18

uud name and charge

Answer 18

Proton, +1

Question 19

udd name and charge

Answer 19

Neutron delta, 0

Question 20

uuu name and charge

Answer 20

plus plus, +2

Question 21

ddd name and charge

Answer 21

delta minus, -1

Question 22

Antiparticles are represented by a …

Answer 22

small bar above the symbol

Question 23

Mesons must be made of a … and a …

Answer 23

Quark
Anti-Quark

Question 24

For first generation mesons they are known as … or …

Answer 24

Pi mesons
Pions

Question 25

What is the combination of quarks and anti-quarks for a pi plus meson?

Answer 25

_ du

Question 26

What is the charge for a pi plus meson?

Answer 26

1+

Question 27

What is the combination of quarks and anti-quarks for a pi minus meson?

Answer 27

_ ud

Question 28

What is the charge for a pi minus meson?

Answer 28

-1

Question 29

What is the combination of quarks and anti-quarks for a pi zero meson? 1

Answer 29

_ uu

Question 30

What is the charge for a pi zero meson?

Answer 30

0

Question 31

What is the combination of quarks and anti-quarks for a pi zero meson? 2

Answer 31

_ dd

Question 32

What is the charge for a pi zero meson?

Answer 32

0

Question 33

Can leptons exist on their own?

Answer 33

Yes

Question 34

Each lepton is given what?

Answer 34

A lepton number

Question 35

Any particles that are not leptons have a lepton number of ...

Answer 35

0

Question 36

Electrons lepton number is?

Answer 36

1

Question 37

Electron neutrinos number is?

Answer 37

1

Question 38

Anti-electrons number is?

Answer 38

-1

Question 39

Electron Anti-neutrinos number is?

Answer 39

-1

Question 40

What are the three conservation laws that apply to decay reactions or collision reactions?

Answer 40

Conservation of Momentum Conservation of Mass-Energy Conservation of Charge

Question 41

In any interaction between particles in a system the baryon number in the system must ...

Answer 41

Not change

Question 42

In any interaction between particles in a system the lepton number in the system must ...

Answer 42

Not change

Question 43

What are the four kinds of forces that can be involved in a reaction?

Answer 43

Gravitational Force, Weak Force, Electromagnetic Force, Strong Force

Question 44

Weak forces

Answer 44

Effect all particles, Range is very short, very weak force, Involves Neutrinos and change in quark flavour, slowest interaction time x10^-12s

Question 45

Electromagnetic Force

Answer 45

Effects charged particles, Range is infinite, Stronger than weak forces, Involves photons and the particles interacting have a charge, middle interaction time 10^-17s

Question 46

Strong Forces

Answer 46

Effects only quarks, Range is short, The strongest interaction, Only involves hadrons and is the fastest interaction time 10^-23s