• atom ⪢⪢
An atom is the smallest unit of a substance.
http://qindex.info/i.php?x=12207

• atom ⪢⪢
http://qindex.info/i.php?x=16195

• atom ⪢⪢
http://qindex.info/i.php?x=20973

⨀⨀⨀ The General Atomics MQ-1 Predator ⪢⪢
#military
http://qindex.info/i.php?x=24249

○○○ axis ⪢⪢
We are not counting the rotation around the axis joining the two atoms.
http://qindex.info/i.php?x=16224

○○○ 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.
http://qindex.info/i.php?x=19988

• The Periodic Table
The Periodic Table: Atomic Radius, Ionization Energy, and Electronegativity
http://qindex.info/i.php?x=4765

• 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
http://qindex.info/i.php?x=4013

• Now let's consider a system consisting of one molecule containing two atoms.
http://qindex.info/i.php?x=16206

• atom
http://qindex.info/i.php?x=27851

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