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hadi salman
June 14, 2013 11:06AM

i ask did demulsifier cause damage to catalysis in refinery process with referen...
hadi salman
June 14, 2013 11:06AM

i want ask about catalysis
Erich Knight
June 08, 2013 05:06AM

The Clovis people & the Younger Dryas knocked out 80% of large land mammals ...
SATHISH KOKKULA
June 04, 2013 08:06PM

Very clear and concise information.

Periodic Table

Periodic Table

The periodic table of the elements is a graphic display of the 118 described chemical elements geometrically organized by selected properties of their atomic structures. Elements are set forth by increasing atomic number]], the number of protons in the atomic nucleus. 

While rectangular in general outline, gaps are included in the horizontal rows in order to keep elements with similar properties together in vertical columns (termed groups); examples of these groups are noble gases, alkali metals, alkali earths and halogens.

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Recently Updated
Neon Last Updated on 2013-04-29 at 20:11 Named from the Greek word meaning "new", neon is a colorless, odorless gas. It is nearly inert towards all other elements and chemicals. The primary use of neon is... More »
Mendelevium Last Updated on 2012-07-14 at 01:56 Mendelevium (pronounced men-deh-LEE-vi-em) is an artificially produced, radioactive element with the symbol Md and the atomic number 101. Mendelevium is a metallic,... More »
Krypton Last Updated on 2012-07-13 at 11:16 Krypton is the chemical element with atomic number 36 and atomic symbol Kr.  It is a member of the [noble gases] (group 8 of the Periodic Table).  Krypton is found as... More »
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Astatine Last Updated on 2012-07-06 at 06:16 Previous Element: Polonium Next Element:... More »
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