physics revision

Question	Answer
What was the Rutherford experiment	the gold foil experiment
What did Rutherford expect from the experiment and what actually happened	Rutherford expected all the positively charged alpha particles to go straight through some refracted and some reflected
what is the source of background radiation	rock soil gives off radon gas
why is gamma radiation used to sterilize food?	it kills micro organisms
why is gamma radiation used to treat cancer	it destroys damaged cells
how does alpha radiation work in fire alarm	alpha radiation ionises the air within
what safety measures are put in place for handling radioactive substances	-Hazmat suits -Tongues -gloves -lead lining
what stops alpha particles	paper
what stops beta particles	aluminium
what stops gamma particles	thick lead
what is an isotope	elements with different numbers of neutrons
what is half life	how long it takes a substance to half in quantity
what is an ion	charged atom
what is ionising ?	radiation causes ions to form
what is random decay?	when it is impossible to predict when an atom will decay
what is spontaneous decay?	impossible to influence decay date
what is a becquerel?	unit of measurement of radiation

Resource summary

	Created by morgan brazier almost 5 years ago