Magnesia, a district in Thessaly in central Greece. Magnesium is a silver-white, relatively soft metal. Inflammation in the lungs and shortness of breath (a condition called berylliosis). BerylliumĪccumulates in bones long-term exposure to beryllium results in Power plants because of its ability to reflect neutrons. Transparent to X-rays), and is used in alloys with other metals, such asĬopper and nickel, to make spark-proof tools and watch springs.īeryllium is also using in casings for nuclear weapons and in nuclear
#Magnesium atom windows
Elementalīeryllium is very unreactive towards air and water, even at highīeryllium is used to make windows for X-ray tubes (it is Through covalent bonding instead of ionic bonding.
Of these gems comes from trace amounts of chromium.īecause of its small size and high charge density, beryllium bonds Gemstone-quality beryls include emeralds and aquamarine the green color The Earth's crust at a concentration of 2.6 ppm, making it the 47th most The Greek word for the mineral beryl, beryllo. Some Group 2A salts bond strongly to water molecules, and crystallize as hydrates Īmong these are Epsom salt, MgSO 4♷H 2O, and gypsum,īeryllium is a silver-white, soft metal. Nevertheless, many Group 2A salts are at least moderately soluble. Group 1A because of the higher charge densities on the 2+ cations Salts of the Group 2A metals are less soluble in water than those of Harder metals than the Group 1A elements, but are soft and lightweightĬompared to many of the transition metals. Strontium at 768✬, barium at 727✬, and radium at 700✬. Metals: beryllium melts at 1287✬, magnesium at 649✬, calcium at 839✬, The alkaline earth metals have much higher melting points than the alkali In most cases, the alkaline earth metals are ionized Same period, and therefore have higher ionization energies. They are smaller than the alkali metals of the The alkaline earth metals have two valence electrons in their highest-energy orbitals Like the Group 1A elements, theĪlkaline earth metals are too reactive to be found in nature in their When dissolved in water, and they remained solids at the temperaturesĪvailable to the ancient alchemists.
The name comesįrom the fact that the oxides of these metals produced basic solutions Less reactive than the alkali metals of Group 1A. Strontium (Sr), barium (Ba), and radium (Ra). Group 2A (or IIA) of the periodic table are the alkalineĮarth metals: beryllium (Be), magnesium (Mg), calcium (Ca),
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