atomic structure (P4) Flashcards
the activity of a quantity of radioactive material in which one nucleus decays per second. is what unit of radioactivity?
bequerel - Bq
what is half-life
time taken for a half an unstable nuclei to decay
name the radiation emitted from radioactive materials that consists of high speed electrons
beta
Substances that give out radiation from the nuclei of their atoms all the time are said to be… what
radioactive or unstable
how can radiation be recorded
what specifically does this device record
geiger-muller tube
the count number. the cound number is the number of decays each second
what do alpha particles consist of
they’re the same as a helium nuclei
2 neutrons and 2 protons
what do alpha particles consist of
what do beta particles consist of
relative mass and charge of all the three
alpha - relative mass 4, charge +2
