GCSE Physics - created from Mind Map

Seite 1

Term 1

Atomic structure

nucleus contains protons and neutrons

beta radiation

alpha radiation

gamma radiation- an electromagnetic wave

radioactive decay is the unstable nucleus changing to become more stable and therefore giving out radiation

ionisation can cause cancer through mutating DNA

activity- the rate at which decay occurs

atoms have no charge

JJ Thompson came up with the plum pudding model

irradiation is when a product is exposed to radiation

radius of an atom is 0.1nm

half life- its is the time taken for a radioactive nuclei to half

has a medium ionising power

high ionising power

a thin sheet of paper will absorb alpha rays

the range of gamma radiation in air is 5 cm

alpha decay alters the parent nuclei by decreasing their atomic number by 2

low ionising power

serveral mm of lead will absorb gamma rays

the range of gamma radiation is unlimited