Turley,+William

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Hydrogen


Date Discovered – 1766 by Henry Cavendish in London UK Origin of the name - from the Greek "hydro" and "genes" meaning water forming.

** FACTS: **
Melting Point -259.1º C or -434.38º F Boiling Point -252.879 º C or -4423.182 º F  Density – 899 (6k) Number of Protons 1 Number of Electrons 1 Number of Neutrons 0 Number of Valence Electrons 1 Cost per gallon (2008) $2.47 Symbol – H Atomic Mass 1.00794 amu Electron configuration and orbital notation – 1s1

Two common chemical reactions are Hydrogen peroxide ( H2O2 ) and Water (H 2O) Hydrogen is a colorless, odorless gas that can become explosive when mixed with air. It is currently manufactured from methane gas and is seen by many as the clean fuel of the future. It is used in agriculture. Hydrogen is the most abundant element in the universe.



Hydrogen was blamed for the Hindenburg disaster on May 6, 1937.

SOURCES: Visual Elements, 2011, Wikipedia; latech.edu

G.W.C. Kaye and T.H. Laby Tables of Physical and Chemical Constants, Longman, 16th Edition, 1995, Wikipedia; chemical elements. com
=**MAGNESIUM**=

magnesium is a grayish-white metal.

Magnesium is the eighth most abundant element in the earth's crust

FACTS


 * Symbol || Mg ||
 * Date of Discovery || 1808 ||
 * Discoverer || Sir Humphrey Davy ||
 * Atomic Weight/Mass || 24.3050(6) ||
 * Atomic Number || 12 ||
 * Color || Silvery White ||
 * Classification || Metallic ||
 * Boiling Point || 1363 K (1091 °C, 1994 °F) ||
 * Melting Point || 923 K (650 °C, 1202 °F) ||
 * Group in periodic table || 2 ||
 * Number of Protons/Electrons || 12 ||
 * Number of Neutrons || 12 ||
 * Density @ 293 K || 1.738 g/cm3 ||
 * Magnesium source || Water ||
 * Electron configuration || 1s2 2s2p6 3s2 ||
 * Number of valence electrons || 3s2 ||
 * Two chemical reactions || with oxygen it ignites it does not react with water ||
 * Cost/Value || $3.70 per 100 grams ||
 * Primary mining areas || Austria, Canada, China, India, Poland, Russia & USA ||



UNUSUAL FACTS

Daily human dietary intake is 250-380 mg Magnesium is the main ingredient in fireworks.



Sources:

webelements .com; wikianswers .com ; environmentalchemistry .com, webexhibits .com