| free electron |
An electron not bound to an atom or molecule. In this sense a (negative) beta particle is a free electron.
출처: amsglossary.allenpress.com/glossary/browse
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|---|---|
| free radical |
A chemical species that possesses an unpaired electron. These compounds, such as chlorine monoxide (ClO), hydroxyl radical (OH), and nitric oxide (NO), are characterized by a high chemical reactivity. Free radicals are often generated in the atmosphere from the photodissociation of more stable species. Their subsequent chemistry is central to such environmental issues as stratospheric ozone depletion and tropospheric oxidant production.
출처: amsglossary.allenpress.com/glossary/browse
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| freeze |
To attempt to retain possession of the ball or puck for an extended period of time without making an effort to score.
출처: library.thinkquest.org/12590/dictionary.htm
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| freezing |
the point at which cold turns liquid into solid.
출처: library.thinkquest.org/J001539/glossary.html
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| free radical |
Atom which carries an unpaired electron; free radicals can potentially injure cells and may be responsible for numerous age-related diseases.
출처: www.peteducation.com/dict_alpha_listing.cfm
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