3.7 Flashcards
who found radioactivity and how
henri becquerel had photographic plates in the same draw as uranium and they darkened like they do when exposed to xrays
the three types of radiation
alpha beta gamma
what is the composition of alpha radiation
helium nucleus
what is the composition of beta radiation
electrons
what is the composition of gamma radiation
high energy electromagnetic radiation
what is lost in alpha decay
helium nucleus 2 protons 2 neutrons
why is energy emitted from alpha decay equations
small amounts of mass is lost in the process which is converted into energy by e = mc^2
what is a half life
the time half the the nuclei in a sample decay
what happens in beta decay
a neutron turns into an electron and a proton
where does gamma radiation come from
the transition of electrons between electronic energy levels
what is the name of elements with high values of Z
transuranic elements
how are new elements made in particle accelerators
small nuclei are accelerated fast into a larger target
