Particles

Question 1

What are the constituent particles of an atom?

Answer 1

proton neutron electron

Question 2

What is the atomic number, Z?

Answer 2

Number of protons

Question 3

What is the nucleon number, A?

Answer 3

Total number of nucleons in the nucleus ie. protons + neutrons

Question 4

What is the charge and rest mass of a proton?

Answer 4

Q = +1.6 x 10^-19C

m_p = 1.67 x 10^-27kg

Question 5

What is the charge and rest mass of a neutron?

Answer 5

Q = 0 (neutral)

m_n = 1.67 x 10^-27kg

Question 6

What is the charge and rest mass of an electron?

Answer 6

Q = -1.6 x 10^-19C

m_e = 9.11 x 10^-31kg

Question 7

How are sub-atomic particles categorised?

And what further sub-divisions are made?

Answer 7

Leptons and Hadrons.

Hadrons are further divided into baryons and mesons.

Question 8

Which properties are conserved in all interactions?

Answer 8

momentum

charge

mass/energy

lepton number

baryon number

Question 9

Which property is conserved in strong interactions but not weak interactions?

Answer 9

Stangeness

Question 10

Name the leptons

Answer 10