3 observations and their significance in Rutherford alpha scattering experiment
- most came through > mostly empty space >nucleus v small
- some deflected, some more than 90 >not plum pudding > must be dense positive charge
- protons couldn’t account for mass >neutrons must also be present
What’s responsible for beta decay
Weak nuclear force
What’s the strong nuclear force
The force holding nucleons together. Steiger than the repulsive force
What is the strong force carried by?
Why do heavier elements have more neutrons than protons?
To dilute the strong electrostatic repulsion
What carries the weak nuclear force?
Bosons (w and z)
What are hadrons
Made up of quarks. Affected by strong nuclear force and the electromagnetic force of charged eg proton
What’s a lepton
Fundamental particle or antiparticle not affected by the strong nuclear force eg electron
What’s are baryons?
Hadrons made of 3 quarks
What are mesons
Hadrons of 2 quarks, one normal and one anti
Example of mesons
Kaons and pions
What are neutrinos
Leptons with no charge or mass eg electron neutrino
What is the Barton number of every quark
What is a proton made up of
What’s a neutron made up of
Beta minus radiation equation
Neutron -> proton + beta minus + electron antineutrino
Beta plus radiation equation
Proton -> neutron + beta plus + electron neutrino