When was the Element Manganese added to the periodic table. What was the year?
463143
In 1869 when the periodic table first was created by Mendeleev.  The element was first isolated in 1774.
582086
Tin is a chemical element in the periodic table that has the symbol Sn (L. Stannum) and atomic number 50. This silvery, malleable POOR METAL that is not easily oxidized in air and resists corrosion, is found in many alloys and is used to coat other metals to prevent corrosion. Tin is obtained chiefly from the mineral cassiterite, where it occurs as an oxide.
955310
Although I don't understand why you wouldn't just search for the answer, it is ununbium, which is the temporary IUPAC name for an element synthesized for a brief time (<< 1s) in around 2002 and 2004. It is not naturally occuring and little is known about it.
59388
The periodic table as of Oct. 2005 according to IUPAC shows 111. But the elements with atomic numbers 112, 114, and 116 have been reported but not have not been fully authenticated as of September 2003 (Pure Appl. Chem. 75(10), pp. 1601-1611, 2003).
403502
Here is one : http://en.wikipedia.org/wiki/Periodic_table
879268
Zinc is by far the best element. I also like plutonium.  It's just fun to say. "Plutonium."
1013374
In chemistry, a metal (Greek: Metallon) is an element that readily forms ions (cations) and has metallic bonds. Metals are sometimes described as a lattice of positive ions (cations) surrounded by a cloud of delocalized electrons. The metals are one of the three groups of elements as distinguished by their ionisation and bonding properties, along with the metalloids and nonmetals. On the periodic table, a diagonal line drawn from boron (B) to polonium (Po) separates the metals from the nonmetals. Elements on this line are metalloids, sometimes called semi-metals; elements to the lower left are metals; elements to the upper right are nonmetals.
56248
Check ur previous question's answer given by me.The site given in it contains all ur answer based on the Periodic Table of the elements.If U want the site in this answer too,then here it is:-\nhttp://mtsu32.mtsu.edu:11233/111-ch3.html
92319
Molybdenum is a silvery-white, hard, transition metal. Scheele discovered it in 1778. It was often confused with graphite and lead ore. Molybdenum is used in alloys, electrodes and catalysts. The World War 2 German artillery piece called "Big Bertha" contains molybdenum as an essential component of its steel.
720109
Mn2+ is the common ion
44826
Copper is #29 on the period table (yes, 4th period), but notice it's average atomic mass is 63.55.  Since electrons weight practically nothing, that means the weight of the protons and neutrons is 63.55.  Since it is #29, it has 29 protons by definition.  So on average it has 63.55 - 29 = 34.55 neutrons.\n\nRemember that though an element has roughly the same number of neutrons as protons, each atom can have a different number of neutrons.  These are called "isotopes".  But on average, copper has 34.55, according to the periodic table I've cited below.
782015
The MOST recently discovered element was atomic number 118.  It is being temporarily called 'ununoctium'.  As to WHEN it was discovered... that's a little more complicated.\n\nA team of element-makers at Lawrence Berkeley lab claimed to have made it in 1999, but when nobody could reproduce the find with the lab's methods (even the original lab), their finding was discredited.\n\nIn Spring of 2002 (it took four months) the Joint Institude of Nuclear Research in Dubna claimed to have produced an atom of ununoctium.  This was confirmed by Dubna and the Berkeley lab when each of them produced another atom in 2005.\n\nThe average lifespan of these three atoms was just under a thousandth of a second.  So don't expect any accumulation of the stuff!
223202
goto http://www.webelements.com/ or better stillhttp://www.schoolscience.co.uk/periodictable.html run over the element with your mouse it tells you what it is
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Atomic number\nThis was an idea by Mossely
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It is now called Roentgenium 111. Look it up in any search engine.
377494
EN8 and EN8A have different Manganese concentrations.  See link below.
874297
+2.\n\n(The element is never found as a free element but does occur in the minerals columbite ((Fe,Mn)(Nb,Ta)2O6), columbite-tantalite or coltan ((Fe,Mn)(Ta,Nb)2O6), pyrochlore ((Na,Ca)2Nb2O6OH,F), and euxenite ((Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6). )2 in subscript.