p4 Flashcards
was does the small number tells us
protones
what charge do protons have
positive cargo but overall negivite
eats the larger number called
mass number total number of proons and neutrons added together
what’s t called when the atom has the same element but different neutrons
isotope
can atomes lose electrons
yes plus 1 change ti ion
discovery of atoms in order
in 1897 discover electrons plum pudden model Neils Thor found out cell orbits James Chadwick discover neutrons
alpha scattering experiment
took a gold foil just a few atom think then fright tiny alpha particle at the thin foil then whenstright through until one blinked back and reflected meaning that atoms are empty space middle atom positive charge called nucleus
is radioactive decay a straight process
no radioactive decay I a random process
what do u do when a isolate has a unstable nucleus
gives out radiation called rioaxtive decay
what is the activity measured in
becquerel bq I bq I de ay per second
was is a geiger muller tube
to measure the rdioactive sorce
what are 4 types of radiation
alpha (two Newton two protons )
beta (electron which is ejected fro nucleus high speed)
gamma ray ( electric magnetic ratio ratio. from newclus \0
Newton
4 radioation range in air
alpha 5cm =bta 15cm gamma 7 metter
how do u stop alpha
sheet of paper
which one do you have to stop by a few mm of alluvium
beta
how do u stop gamma radiation
by 7 cm of lead
alpha
s 4 ans 2
beta
0 -1
what can isoniting radiation dion to humans
cause cancer
how do u sterilise objects from gamma radiation
plave a plastic wrapped after sterilised plase the object near a radioactive isotope inside lead shelled to protect gamma radiation kills all bacteria the object don’t nor become radioactive
if a object can’t be heated a sterilised
it goes through gamma radiation
what can do to stop rraduoion from body
gloves lead apron glass shield wall lead walls
peer review
explore the affect of radiation on humans need to be punished and checked called peer view
