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Cards (18)
what is a chain reaction
self sustaining
series of
reactions
define fusion
two nuclei collide
at
high speed
and
join
to
create
a
heavier nucleus
define fission
release
of
energy
from a
large
and
unstable
atoms by
splitting
them into
smaller
atoms
2 ways radation is used in medicine
x
rays
medical
tracers
define contamination
unwanted radioactive atoms
get onto an
object
, which may
emit radiation
define irradiation
exposure
to
radiation
and doesnt make it
radioactive
give two aspects of your life that could affect your radiation dose
where you
live
what
job
you
have
define radiation dose
the
risk
of
harm
to body
tissues
due to
exposure
to
radiation
what type of nuclear decay doesnt change the mass or charge of a nuetron
gamma rays
give alpha, beta and gamma radiations range in the air
alpha
-cms
beta-a
few meters
gamma- a
long distance
give alpha, beta and gamma radiations ionising power
alpha-
strong
beta-
moderate
gamma-
weak
name for things that may be emmited during radioactive decay
alpha
particles
beta
particles
gamma
rays
nuetrons
what is radioactive decay
the process of
unstable
atoms giving out
radiation
to become more
stable
true or false, isotopes have different mass numbers
true
what is the atomic number of an atom
the number of
protons
in an
atom
which number defines what element an atom is, atomic or mass
atomic
what happens to an atom if it looses one or more of its outer shell electrons
it becomes
positively charged
true or false, atoms have no overall charge
true