unit test Flashcards
radiation
Energy transmitted in waves or a stream of particles.
Radioactivity
the radiation including alpha particles electrons and gamma rays by a radioactive substance
radon
found in air
if we breath it we get cancer
silent killer
Cosmic
outerspace
x ray
a form of electromagnetic radiation with high energy
gamma
high energy electromagnetic radiation with no charge
isotope
have the same # of protons but different #s of neutrons
Teresthal
earth
High oltra violet
a electro magnetic radiation
Half life
amount of time required for one half of the original radioactive atoms to change
nuclear decay
where the nucleus of a unstable atom losses energy by emitting radiation
Proton
positive charge live in the nucleus
make up the atomic #
neutrons
no charge
in the nucleus
if you change the neutrons it becomes a isotope
Electrons
negative charge
orbit the nucleus
alpha
a positive charged particle
consisting of 2 protons and 2 neutrons
and 4 atomic mass units
