Periodic Table
-
standard table
-
large table
Chemical Elements
-
by name
-
by symbol
-
by atomic number
Chemical Properties
Chemical Reactions
Organic Chemistry
Branches of Chemistry
Analytical chemistry
Biochemistry
Computational Chemistry
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Environmental chemistry
Geochemistry
Inorganic chemistry
Materials science
Medicinal chemistry
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Organic chemistry
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Physical chemistry
Polymer chemistry
Supramolecular Chemistry
Thermochemistry
641
Years:
637
638
639
640
-
641
-
642
643
644
645
Decades
:
610s
620s
630s
-
640s
-
650s
660s
670s
Centuries
:
6th century
-
7th century
-
8th century
Events
Founding of the city of
Fostat
, later
Cairo
, in Egypt.
Revolt against Byzantine emperor
Heraclonas
; he is deposed and his brother
Constans II
becomes sole emperor.
Caesarea
surrenders to the
Arabs
Chindaswinth deposes Tulga , becomes king of the
Visigoths
.
Deaths
Emperor Jomei of Japan
King Mu of Baekje
February 11
-
Heraclius
,
Byzantine emperor
01-04-2007 01:16:19
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