Particles

Question 1

What are the nucleons?

Answer 1

Protons and Neutrons

Question 2

Which lepton was the first fundamental particle found?

Answer 2

Electron

Question 3

What is an Isotope?

Answer 3

It has the same number of protons, but a different number of neutrons.

Question 4

How do you calculate Specific Charge

Answer 4

Charge divided by the mass

Question 5

Which force keeps the nucleus stable and only has short range attraction up to 3fm?

Answer 5

Strong nuclear force

Question 6

Where is the strong nuclear force repulsive?

Answer 6

Closer than 0.5fm

Question 7

When a particle and its antiparticle meet, there is……

Answer 7

Annihilation resulting in two photons.

Question 8

When a photon produces a particle and its antiparticle, it is called…..

Answer 8

Pair production.

Question 9

The anti-electron is called the…..

Answer 9

Positron

Question 10

Name the 6 quarks

Answer 10

up, down,
strange, charm,
top, bottom

Question 11

Name all 6 leptons

Answer 11

Electron, Electron neutrino,
Muon, Muon neutrino,
Tau, Tau neutrino

Question 12

Name the four fundamental forces and their bosons

Answer 12

Strong (Gluon)
Electromagnetic (photon)
Weak (W+, W-, Z0)
Gravity (graviton ?)

Question 13

What are the quarks in a proton?

Answer 13

u u d

Question 14

What are the quarks in a neutron?

Answer 14

d d u

Question 15

What are the quarks in a K+ meson?

Answer 15

up, antistrange

Question 16

What are the quarks in a pi-zero meson

Answer 16

up and antiup or
down and anti down or
Strange and antistrange

Question 17

What are the quarks in a pion- meson

Answer 17

down, anti up.

Question 18

All mesons are made of……

Answer 18

a quark and and antiquark

Question 19

All baryons are made of

Answer 19

Three quarks

Question 20

What types of particles are hadrons?

Answer 20

Mesons and Baryons.

Question 21

Leptons can change into other leptons in what interaction?

Answer 21

Weak

Question 22

Strange particles all decay through which interactions?

Answer 22

Weak.

Question 23

Strangeness is always conserved in what interactions?

Answer 23

Strong

Question 24

Momentum is always conserved in what interactions?

Answer 24

All interactions.

Question 25

Conservation of mass-energy happens in what interactions?

Answer 25

All interactions

Question 26

Conservation of charge happens in what interactions?

Answer 26

All interactions