2.1 THE STANDARD MODEL

Question 1

10 -15
10 -12
10 -4
10 4
10 5
10 6
10 7
10 9
10 21

Answer 1

Diameter of a proton

Diameter of the atom

Dust particle

diameter of city Perth

distance between Aberdeen and Dundee

lenght of Great Britain

diameter of the Earth

diameter of the Sun

distance to the nearest galaxy

Question 2

A fundamental particle is

Answer 2

one which cannot be broken into anything else

Question 3

THE RUTHERFORD ALPHA SCATTERING EXPERIMENT

RESULTS

Answer 3

1. Atoms are mostly empty space
2. The center of the atom has a very large mass and a positive charge

Question 4

Annihilation

Answer 4

occurs when a matter particle meets an anti-matter particle and energy is released

eg; PET ( positron emmision tomography

Question 5

how many fundamental parrticles ?

Answer 5

12

Question 6

STANDARD MODEL

Answer 6

https://th.bing.com/th/id/OIP.2NvIyAIRBcEdnsrDlob5IQHaFA?pid=ImgDet&rs=1

Question 7

HADRONS

Answer 7

ARE THE PARTICLES MADE UP OF TWO OR MORE QUARKS

Question 8

Baryons

Answer 8

are made of 3 quarks

eg: proton (up,up, down) neutron(up, down, down)

Question 9

Mesons

Answer 9

are made of two quarks with an anti-quark pair

Question 10

the evidence of existance of Neutrinos

Answer 10

radioactive beta decay experiment

Question 11

Four fundamental forces

Answer 11

1. Strong (Nuclear) force gluon
2. Weak (Nuclear) force W and Z bosons
3. Electromagnetic photon
4. Gravitational graviton