PARTICLES AND ITS NATURE

Question 1

What are leptons?

Answer 1

Fundamental particles: electron and electron-neutrino

Question 2

What are hadrons?

Answer 2

Particles made up of quarks

Question 3

How many quarks make up a baryon?

Answer 3

3 quarks

Question 4

How many quarks make up a meson?

Answer 4

quark-antiquark pair (2)

Question 5

What is the charge of an up quark?

Answer 5

0.6666666667

Question 6

What is the charge of a down quark?

Answer 6

-0.3333333333

Question 7

What is the quark composition of a proton?

Answer 7

up up down

Question 8

What is the quark composition of an anti-neutron?

Answer 8

anti up, anti down, anti down

Question 9

What is the quark composition of a delta minus particle?

Answer 9

down, down, down

Question 10

What is the quark composition of a π⁻ meson?

Answer 10

anti up, down

Question 11

What is the lepton number of an electron?

Answer 11

1

Question 12

What is the lepton number of an electron anti-neutrino?

Answer 12

-1

Question 13

Give 3 examples of numbers that can be conserved in an interaction

Answer 13

momentum, charge, mass number, lepton number, baryon number, quark numbers

Question 14

Which force is present if there is a neutrino involved in an interaction?

Answer 14

Weak nuclear force

Question 15

Which force is present is there is a quark flavour change in an interaction?

Answer 15

Weak nuclear force

Question 16

Which force is present if an interaction only involves hadrons?

Answer 16

Strong nuclear force

Question 17

Which force is present if there are photons in an interaction?

Answer 17

Electromagnetic

Question 18

What are the 4 fundamental forces?

Answer 18

Gravitational, Strong nuclear, Weak nuclear and Electromagnetic