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chem vocab
radioactivity
6
Science
10th Grade
01/20/2011

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Term
decay
Definition
unstable nucleus emits a nucleon to become stable
Term
transmutation reactions
Definition
result in the transformation of one specific element into another
Term
bombardment
Definition
use a particle to hit a stable nuclei to cause them to become unstable and undergo nuclear charge
Term
half-life
Definition
time required for the number of radioactive particles to reach one half of the original value
Term
radius of ions
Definition
atom loses 1 or more electrons(become positive) it loses a layer and its radius decreases
Term
tonic radius
Definition
atom gains 1 or more electrons(negative) its fills its valence layer,and radius increases
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