18- atom

Question 1

Equation for total energy of particle:

Answer 1

Etotal= Erest + Ekinetic

Etotal=γmc^2

Question 2

Define quark:

Answer 2

A fundamental particle: the building block for protons, neutrons and other particles

Question 3

Quark list

Answer 3

Up, down,antiup, anti down

Question 4

Charge on up quark?

Answer 4

+2/3e

Question 5

Charge on down quark?

Answer 5

-1/3e

Question 6

What is a gluon?

Answer 6

The exchange particle that mediates the strong nuclear force.

Question 7

What is the strong nuclear force?

Answer 7

A fundamental force that holds nuclei together.

Question 8

What is an antiparticle?

Answer 8

The counterpart to a particle with opposite charge (if it’s charged) and opposite spin. Equal rest energy, and lepton number.

Question 9

What is a lepton?

Answer 9

Fundamental particles that interact through a nuclear force called a weak interaction. Electrons are a lepton. Weak interaction is responsible for beta decay.

Question 10

What are Hadrons?

Answer 10

Composite particles (made up of quarks) that interact through the strong interaction.

Question 11

List the 4 leptons you need to know:

Answer 11

Electron, positron, electron neutrino and anti electron neutrino.

Question 12

How are positrons emitted?

Answer 12

Through beta plus decay.

Question 13

example of creation of antiparticle pair?

Answer 13

Gamma ray photon producing an electron and positron.

Question 14

What happens during beta minus decay?

Answer 14

neutron decays into a proton and electron, antineutrino also released.