(1 u is equal to 1/12 the mass of one atom of carbon-12) Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol. It is a very flammable metal. 1 Answer anor277 Sep 12, 2016 Got a Periodic Table? There is also a special converter for historical units of weight you might want to visit for ancient, medieval and other old units that are no longer used. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). Find Atomic weight of Magnesium (Mg) or Find Atomic weight and density of over 118 known elements like atomic weight or density of Hydrogen, Helium, Carbon, Sodium, Nitrogen, Oxygen, Iron, Silicon, Aluminum, Copper, Silver, Gold, Platinum, Phosphorus, Magnesium and other elements Magnesium is a chemical element with the symbol Mg and atomic number 12. Name: Magnesium Symbol: Mg Atomic Number: 12 Atomic Mass: 24.305 amu Melting Point: 650.0 °C (923.15 K, 1202.0 °F) Boiling Point: 1107.0 °C (1380.15 K, 2024.6 °F) Number of Protons/Electrons: 12 Number of Neutrons: 12 Classification: Alkaline Earth Crystal Structure: Hexagonal Density @ 293 K: 1.738 g/cm 3 Color: grayish Atomic Structure Magnesium is classified as an alkaline earth metal and has 2 hydration shells. Weights of atoms and isotopes are from NIST article. It is obtained from seawater. What is the atomic mass of Mg? The atomic weight of sodium (Na+ ) is 23. Therefore, for Na+, 23 g = 1 mole 23 mg … Previous values may be consulted from the 1993 table , the 1995 table , the 1997 table , the 1999 table , the 2001 table , the 2005 table , the 2007 table , the 2009 table , the 2011 table , the 2013 table or the 2015 table . Chemistry Matter Atomic Mass. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. Explanation: You will definitely have to use a Periodic Table in an exam; if you become a scientist or an engineer, you will use it daily. … Similarly, one millimole (mmol) is equal to one-thousandth of a mole or the molecular (or atomic) weight in milligrams. Magnesium is an important enzyme cofactor and … Magnesium is an element that is essential for human nutrition. Magnesium hydroxide [Mg(OH) 2] Magnesium nitrate [Mg(NO 3) 2] Magnesium oxide (MgO) Magnesium peroxide (MgO 2) Magnesium sulfate (MgSO 4) Interesting facts: It is the eighth most common element in the earth's crust, but is the most commercially used element. This alkaline earth metal has atomic number 12 and element symbol Mg. Thus, since the atomic mass of iron is 55.847 amu, one mole of iron atoms would weigh 55.847 grams. Convert Atomic Mass Unit (amu) to Milligram (mg), Metric This converter features contemporary units of weight. The pure element is a silver-colored metal, but it tarnishes in air to give it a dull appearance. I did chemlab on atomic weight of magnesium it ask for 600ml beaker, add 300 ml of water add 30ml of HCI (2M) to beaker and stir...(doing this lab on line) add 10 mg of Magnesium metal to the beaker...allow hydrogen gas to evolve, all of the magnesium should be consumed...which i saw the bubbles come up and then disappear...now step 6 says to record the amount of hydrogen gas evolved … World Wide Web version of atomic weight data originally prepared by G. P. Moss, from a file provided by D. R. Lide. One mole (mol) of any substance is defined as the molecular (or atomic) weight of that substance in grams. The element can be found in abundance in the hydrosphere and in mineral salts such as dolomite and magnesium carbonate.Common dietary sources of magnesium include nuts (cashews, peanuts, almonds), beans, bananas, apples, carrots, broccoli, and leafy greens. The atomic mass is useful in chemistry when it is paired with the mole concept: the atomic mass of an element, measured in amu, is the same as the mass in grams of one mole of an element.