Give two observations of Rutherfords alpha-scattering experiment
Most of the particles passed straight through the thin gold foil with very little scattering,very few of the alpha particles deflected through angles >90degrees
1 of 19
What did we discover from the first and s cond observation
We discovered the existence of the nucleus and that it was positively charged
2 of 19
What does nucleon refer to
Proton and neutron (hence nucleon number is th number of protons and neutrons)
3 of 19
What force keeps the protons together (ideally in a nucleus)
Strong nuclear force
4 of 19
Does the strong nuclear force act between all nucleons
Yes
5 of 19
What is weak nuclear force responsible for
Beta decay
6 of 19
What is a fundamental particle
A particle that has no internal structure and hence cannot be divided into smaller bits
7 of 19
What two families are subatomic particles classed into
Hadrons and leptons
8 of 19
What are hadrons
Particles and antiparticles that are affected by the strong nuclear force
9 of 19
What are leptons
Particles and antiparticles that are not affected by strong nuclear forces
10 of 19
What is a particle containing a quark called
A hadron
11 of 19
Name the three types of quarks with there antiquarks and
Up anti-up, down anti-down, strange anti-strange
12 of 19
Name the charges for the up quark down quark and strange quark
Up quark = 2/3, down quark=-1/3,strange quark=-1/3
13 of 19
What are baryons
Hadrons that are made up with a combination of three quarks or three anti-quarks ( no mixing of quark and anti-quark
14 of 19
What are mesons
Mesons ar hadrons that are made with a combination of quarks and anti-quarks ( so you can mix quarks with anti- quarks)
15 of 19
What are neutrinos
Fundamental particle that carry no charge and have tiny mass
16 of 19
Name a type of neutrino with its corresponding anti- neutrino
Electron neutrino and electron anti-neutrino
17 of 19
What is annihilation
It's when a particle and its anti particle meet which causes them to completely destroy each other
18 of 19
What happens to the masses of the particle and anti particle when annihilation occurs
The masses of both the particle and antiparticle are converted to high-energy pair of protons
19 of 19
Other cards in this set
Card 2
Front
What did we discover from the first and s cond observation
Back
We discovered the existence of the nucleus and that it was positively charged
Card 3
Front
What does nucleon refer to
Back
Card 4
Front
What force keeps the protons together (ideally in a nucleus)
Back
Card 5
Front
Does the strong nuclear force act between all nucleons
Comments
No comments have yet been made