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Chapter Two Pt. 3
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What are the major players in radioactivity?
three major types of radiation emitted by particles are:
Beta rays (electrons)= negative
Gamma Rays (pure energy= no mass)
Alpha rays= positive particle (release Helium)
A __ is an electron.
beta particle
Both __ and __ have partciles associated with __.
alpha and beta
mass
What is a nuclear equation?
a reaction that changes an atomic nucleus
What is beta radiation?
a beta particle is an electron
- neutron in nucleus spontaneously decays into a proton and electron; particles attracted to positive electrode and repelled by negative electrode
What is alpha radiation?
An alpha particle is a helium-4 nucleus (2 protons and 2 neutrons)
particlues repelled by positively charged electrode and attracted to negatively charged electrode
- results in losee of 2 protons and 2 neutrons, reducing mass number of the nucleus by 4 and atomic # by 2
Gamma Radiation
a gamma particle is a high-energy photon
- unaffected by electric/ magnetic fields
- no mass
- electromagnetic radiation of very high energy
What is positron emission?
a positron has the same mass as an electron but the opposite charge
- occurs when proton in nucleus changes into neutron plus ejected positron
- decrease in atomic # of product nucleus but no change in mass #
What is electron capture?
process in which the nucleus captures an inner-shell electron, thereby converting a proton to a neutron
Nuclear reactors:
__ and __
fusion
fission
What is fusion?
combining
- two smaller nuclei--> one big nuclei
What is fission?
splitting
big atom--> 2 smaller
What is the problem with nuclear things?
nuclear waste
Explain fusion.
Sun
- takes hydrogen atoms and uses to pressure to produce He--> energy
possible on earth
ex
: H bond
Author
DesLee26
ID
171299
Card Set
Chapter Two Pt. 3
Description
La Salle
Updated
2012-09-17T00:08:21Z
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