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26 Cards in this Set
- Front
- Back
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Radioactivity is... |
the release of high energy radiation from a radioactive source. |
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Occurs when... |
changes happen in the nuclei |
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what are the 6 types of radiation |
x-rays, gamma rays, microwaves, ultraviolet waves, radio waves, infrared waves |
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Which is the most dangerous |
gamma rays |
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isotopes are... |
different types of one element that have the same number of protons, different number of neutrons |
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atomic # of an isotope never... |
changes |
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istopes have different... |
mass numbers |
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mass #= |
#protons-#neutrons |
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(2 ways) #neutrons = |
mass # -#protons or mass#- atomic# |
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different isotopes of an element have the same ------1 but different-------2 |
1. atomic # 2. mass #'s |
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in Cl-35 what does the 35 represent |
atomic mass |
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when a radioactive elements emits radiation... these elements have nuclei that are... |
a change occurs in its nucleus and becomes a new element. unstable. |
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To become more stable an element must |
emit radiation |
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positively charged |
alpha |
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negatively charged |
beta |
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neutral particles |
gamma rays |
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symbols that represent alpha particles |
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which particle cant penetrate a peice of paper |
alpha |
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beta symbols are |
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which particle can be blocked by aluminum foil |
beta |
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in beta decay... |
neutron is changed into a proton and an electron, electron is emitted so with one more proton it becomes a new element with same mass number |
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gamma ray symbols |
and look for a * for high energy |
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no mass or charge are which particle |
gamma |
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thick blocks of concrete or lead block which particle |
gamma |
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omit |
omit |
