Magnesium (atomic symbol: Mg, atomic number: 12) is a Block S, Group 2, Period 3 element with an atomic mass of 24.3050. The number of electrons in each of Magnesium's shells is 2, 8, 2 and its electron configuration is Ne 3s 2. Atomic Mass of Magnesium. Atomic mass of Magnesium is 24.305 u. The atomic mass is the mass of an atom. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element.
| Isotope | Atomic mass (Da) | Isotopic abundance (amount fraction) |
|---|---|---|
| 24Mg | 23.985 041 70(9) | [0.7888, 0.7905] |
| 25Mg | 24.985 8370(3) | [0.099 88, 0.100 34] |
| 26Mg | 25.982 5930(2) | [0.1096, 0.1109] |
In 2011, the Commission has changed the standard atomic weight of magnesium to Ar(Mg) = [24.304, 24.307] based on an evaluation of the effect of variation in isotopic abundances in normal materials upon the atomic weight of magnesium. This change is intended to emphasize the fact that the atomic weight of magnesium is not a constant of nature, but depends upon the source of the material. The standard atomic weight was determined by combining (1) the best calibrated isotope-ratio measurement of magnesium in DSM3 isotopic reference material (a mono-elemental nitric solution of magnesium), and (2) the relative isotope-ratio differences between other magnesium-bearing materials and DSM3. Many of the δ26/24Mg measurements reported herein were made using DSM3 as the standard. However, the Commission does not recommend DSM3 as an international measurement standard for δ26/24Mg measurements because it is not readily available to laboratories worldwide.
Atomic weights of the elements 2011 by M.E. Wieser et al. Pure Appl. Chem. 2013 (85) 1047-1078
CIAAW
Magnesium
Ar(Mg) = [24.304, 24.307] since 2011
The name derives from Magnesia, a district in the north-eastern region of Greece called Thessalia. TheScottish chemist Joseph Black recognized it as a separate element in 1755. In 1808, the English chemistHumphry Davy obtained the impure metal, and in 1831 the French pharmacist and chemist Antoine-Alexandre Brutus Bussy isolated the metal in the pure state.
Natural variations of magnesium isotopic composition
Isotopic reference materials of magnesium.
Atomic Number of Magnesium is 12.
Chemical symbol for Magnesium is Mg. Number of protons in Magnesium is 12. Atomic weight of Magnesium is 24.305 u or g/mol. Melting point of Magnesium is 648,8 °C and its the boiling point is 1107 °C.
» Boiling Point» Melting Point» Abundant» State at STP» Discovery YearAbout Magnesium
Magnesium is a soft metal of light grey color, which can easily burn with bright fire. Magnesium is an essential element for all living things on our planet since a molecule of magnesium is in every cell of chlorophyll, which is the material for photosynthesis. In human body, magnesium is a compound of various enzymes necessary for correct and smooth chemical reactions in our body tissues. Since magnesium is very highly reactive, it can’t be found freely in nature, but it can be obtained from a number of natural sources, manly such minerals as dolomites, magnesites, etc. It is the 8th most abundant element on our planet. It has a variety of uses, primarily as a light but relatively strong metal, especially valuable for producing various consumers’ goods like suitcases, chairs, laptops, etc. Magnesium and its compounds are used to produce fireworks, as well as in medicine (especially for producing spasms reducing medicines, as laxatives, etc.).
Uses of Magnesium
Magnesium (Mg) is the most commonly used structural metal after iron and aluminum. It is especially used in the production of steel and iron to remove sulfur as well as one of the most important construction metals in aircraft and automotive industry. Magnesium is widely used in making mobile phones, cameras, televisions, tablet computers, and laptops.
Its compounds are mostly used in construction, electronics, medicine, and sports. For example, Magnesium chloride, the chemical compound with the formula MgCl2 is used for dust control and ice control. This compound is also used in nutraceutical and pharmaceutical preparations too. It is preferred in the preparation of tofu from soy milk as a coagulant. Magnesium sulfite is used in the producing of paper. Besides, magnesium alloys are very important in the airplane and car construction.
There are some other usages of magnesium as a reducing agent and an additive agent in various industries.
Magnesium is also very important for our body. It helps to convert food into energy, repair DNA and RNA, plays an important role in brain functions, and helps to prevent migraine headaches.
Compounds with Magnesium
- MgCl2: Magnesium chloride
- MgO: Magnesium oxide
- Mg(OH)2: Magnesium hydroxide
- MgSO4: Magnesium sulfate
- MgCO3: Magnesium carbonate
- MgSO3: Magnesium sulfite
- F6MgSi: Magnesium hexafluorosilicate
- MgB2: Magnesium diboride
- MgBr2: Magnesium bromide
- MgC2O4: Magnesium oxalate
- MgF2: Magnesium fluoride
Properties of Magnesium Element
| Atomic Number (Z) | 12 |
|---|---|
| Atomic Symbol | Mg |
| Group | 2 |
| Period | 3 |
| Atomic Weight | 24.305 u |
| Density | 1.738 g/cm3 |
| Melting Point (K) | 923 K |
| Melting Point (℃) | 648,8 °C |
| Boiling Point (K) | 1363 K |
| Boiling Point (℃) | 1107 °C |
| Heat Capacity | 1.023 J/g · K |
| Abundance | 23300 mg/kg |
| State at STP | Solid |
| Occurrence | Primordial |
| Description | Alkaline earth metal |
| Electronegativity (Pauling) χ | 1.31 |
| Ionization Energy (eV) | 7.64624 |
| Atomic Radius | 150pm |
| Covalent Radius | 130pm |
| Van der Waals Radius | 173 |
| Valence Electrons | 2 |
| Year of Discovery | 1755 |
| Discoverer | Black |
What is the Boiling Point of Magnesium?
Magnesium boiling point is 1107 °C. Boiling point of Magnesium in Kelvin is 1363 K.
What is the Melting Point of Magnesium?
Magnesium melting point is 648,8 °C. Melting point of Magnesium in Kelvin is 923 K.
How Abundant is Magnesium?
Abundant value of Magnesium is 23300 mg/kg.
What is the State of Magnesium at Standard Temperature and Pressure (STP)?
State of Magnesium is Solid at standard temperature and pressure at 0℃ and one atmosphere pressure.
When was Magnesium Discovered?
Atomic Mass Of Magnesium 24
What Is Magnesium State At Room Temperature
Magnesium was discovered in 1755.
Atomic Weight Of Magnesium