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6.2.1 & 6.2.2 Atomic Theory & Radioactivity, led to, addition to,…
6.2.1 & 6.2.2 Atomic Theory & Radioactivity
technology
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alpha particle emitter
emits radioactivity
photographic screen/plate
detect nuclear radiation
Rutherford's Investigation
#
evidence
most alpha particles
transmitted
#
some were deflected
#
positive nucleus
fired alpha particles
at gold foil
atomic theory
most of atoms
empty space
nucleus
positive charge
radioactivity
#
unstable nucleus
likely too many neutrons
stable nucleus
nuclear radiation (ionising radiation)
alpha
He nucleus
beta
high speed electrons
gamma rays
technology
radiotherapy
treat cancer
#
nuclear bomb
uranium or plutonium
force to reach critical mass
led to
addition to
kills fast growing cells
chain reaction
