Particles

Question 1

specific charge

Answer 1

Charge/mass

Question 2

isotope

Answer 2

atoms with the same number of protons but different number of neutrons

Question 3

how to know how many protons and neutrons their are on a chemical symbol

Answer 3

-top number = neutrons + protons
- bottom number = Protons

Question 4

strong nuclear forces properties

Answer 4

-force which holds nucleus together
-range up to 3fm
-attractive between 0.5fm-3fm
-repulsive below 0.5fm

Question 5

alpha decay properties

Answer 5

• stopped by paper/few cm of air
  -low penertration
  -highly ionising
  -4 2 helium

Question 6

beta decay properties

Answer 6

• medium penetrising and ionising power
  -stopped by few mm of alummium

Question 7

gamma radiation properties

Answer 7

• high energy and frequency
  -low ionising power
• very penetrating
  -reduced by lead

Question 8

antiparticles

Answer 8

Same mass but opposite charge eg e- and e+ which are electron and positron other examples are electron antineutrino+ electron neutrino

Question 9

photons

Answer 9

small packets of energy

Question 10

energy of a photon formula

Answer 10

planks constant x frequency

Question 11

1 electronvolt

Answer 11

energy gained when an electron is accelerated through pd of 1 v

Question 12

energy in electronvolt formula

Answer 12

planks constant x speed of light / wavelength

Question 13

anihilation

Answer 13

particle and antiparticle meet and all their mass is converted into energy released as 2 photons

Question 14

Pair production

Answer 14

particld antiparticle pairs produced from a photon with sufficient energy

Question 15

weak nuclear force

Answer 15

-neutrino interaction induces beta decay
-strength 10-minus 6
-range 10-minus 18

Question 16

Particles of matter chain

Answer 16

Hadrons
baryons - ( made of 3 quarks) proton and neutron
mesons -( quark + antiquark) pions and kion

Question 17

particles of antimatter chain

Answer 17

leptons ( fundamental particles
- electron,neutrino,muon