Particles

Question 1

What is the charge of a proton?

Answer 1

+1.6x10^-19C

Question 2

What is the mass of a proton?

Answer 2

1.67x10^-27 kg (on data sheet)

Question 3

What is the charge of a neutron?

Answer 3

0C

Question 4

What is the mass of a neutron?

Answer 4

1.67x10^-27 kg (on data sheet)

Question 5

What is the charge of an electron

Answer 5

-1.6x10^-19C

Question 6

What is the mass of an electron?

Answer 6

9.11 x 10^-31 kg (on data sheet)

Question 7

What is the relative mass of an electron?

Answer 7

0.0005

Question 8

Define specific charge of a particle

Answer 8

Charge-mass ratio, calculated by dividing a particle’s charge by its mass.

Question 9

What is proton number notation?

Answer 9

Z

Question 10

What is nucleon number notation?

Answer 10

A

Question 11

Define isotope

Answer 11

Atoms with the same number of protons but different number of neutrons.

Question 12

What is the role of the strong nuclear force?

Answer 12

Keeping the nucleus stable.

Question 13

To what length is the strong force repulsive?

Answer 13

0.5fm

Question 14

Range of length the strong nuclear force is attractive?

Answer 14

0.5fm-3.0fm

Question 15

What are unstable nuclei?

Answer 15

Those which have too many protons, neutrons or both causing the strong nuclear force to not be enough to keep them stable. They then decay to become stable.

Question 16

Write the equation of alpha decay

Answer 16

Check pmt

Question 17

Write the equation for beta-minus decay

Answer 17

Check pmt

Question 18

How was the existence of the (anti) neutrino hypothesised?

Answer 18

To account for conservation of energy in beta decay.

Question 19

What does a particle and its corresponding antiparticle have in common?

Answer 19

Same rest energy and mass.

Question 20

Explain annihilation

Answer 20

Where a particle and its corresponding antiparticle collide, as a result their masses are converted into energy. This energy, along with the kinetic energy of the two particles is released in the form of 2 photons moving in opposite directions in order to conserve momentum.

Question 21

Explain pair production

Answer 21

Photon is converted into an equal amount of matter and antimatter. This can only occur when the photon has an energy greater than the total rest energy of both particles, any excess energy is converted into kinetic energy of the particles.

Question 22

What are the four fundamental interactions?

Answer 22

Gravity
electromagnetic
Weak
Strong nuclear

Question 23

Forces between particles are caused by what?

Answer 23

Exchange particles. They carry energy and momentum between particles.

Question 24

What is the equation for electron capture and draw the Feynman diagram

Answer 24

Check pmt

Question 25

Write the equation for electron collision and the Feynman diagram

Answer 25

Check pmt

Question 26

Write the equation for beta-plus decay and the feinman diagram

Answer 26

Check pmt

Question 27

Write the equation for beta-minus decay and the feinman diagram

Answer 27

Check pmt