Particles and radiation

Question 1

Describe the atomic structure of an electron shell atom

Answer 1

a dense central nucleus consisting of protons and neutrons with electrons orbiting the nucleus in shells

Question 2

Formula for specific charge

Answer 2

charge/mass

Question 3

Mass of a proton and neutron?

Answer 3

1.67x10^-27 kg

Question 4

Describe strong nuclear force between two nucleons

Answer 4

repulsive up to 0.5fm, attractive up to 3fm, nuclear separation at 1fm

Question 5

Describe alpha decay

Answer 5

occurs when there are too many protons and neutrons. Proton number decreases by 2, nucleon number decreases by 4

Question 6

Describe beta minus decay

Answer 6

Occurs when there are too many neutrons. Proton number increases by 1. Antineutron is released

Question 7

Describe annihilation

Answer 7

When a particle and its antiparticle collide, forming two gamma-ray photons moving in opposite directions to conserve momentum