atom ⪢⪢
An atom is the smallest unit of a substance.
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 atom ⪢⪢
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 atom ⪢⪢
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⨀⨀⨀ The General Atomics MQ-1 Predator ⪢⪢
#military
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○○○ axis ⪢⪢
We are not counting the rotation around the axis joining the two atoms.
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○○○ Fukushima ⪢⪢
In Japan, the International Atomic Energy Agency begins to study Japan's plan to release radioactive water from the disabled Fukushima nuclear center into the sea.
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 The Periodic Table
The Periodic Table: Atomic Radius, Ionization Energy, and Electronegativity
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 Introduction to Minerals
○ 5 citeria: solid, naturally occurring, inorganic, fixed chemical formula, specific atomic arrangement -- igneous, granite, speckle, quartz, biotite mica, plagioclase feldspar, fluorite, talc, selenite gypsum, pyrite, silicate, bituminous, sulfur, halite
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 Now let's consider a system consisting of one molecule containing two atoms.
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 atom
http://qindex.info/i.php?x=27851
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