Decades later the use of radium ceased when people discovered the dangers of radiation. 3. Solutions made from these oxides and water are bases with a pH greater than 7. They exist in +2 oxidation states. 5) Magnesium hydroxide and magnesium carbonate are used in making toothpaste. By Megan Ray Nichols• Feb 1, 2018• No comments. The alkaline earth metals are: Beryllium Magnesium Calcium Strontium Barium Radium. 3. Copper – Beryllium alloys are used for manufacturing high strength springs. The positive and negative ions are attracted to each other, resulting in a bond that has a net charge of 0. 3) Magnesium (powder or ribbon)  is used in flash powders and bulbs, incendiary bombs and signals. 6) Magnesium also used for ignition of thermite charge in aluminothermy and for preparing Grignard’s reagent which are widely used in organic synthesis. They are generally harder and less reactive than the metals in in group IA, such as sodium, and are softer and more reactive than the metals in group IIIA, such as aluminum. Because of its low atomic number and very low absorption for X-rays, it is used as radiation windows for X-ray tubes and X-ray detectors. 5.2 Alkali metals: The word “alkali” is derived from the word al-qalÄ«y meaning the plant ashes, referring to the original source of alkaline substances. DISCOVERY : 1939, by Marguerite Perey of France NO USES KNOWN 13. Uses of Alkaline Earth Metals; Define Alkaline Earth Metals. Barium is also an ingredient in paint pigments. Ore compounds containing beryllium, aluminum and silicon can form green and bluish-colored gemstones such as emeralds, aquamarine and alexandrite. Read Time: 4188博金宝电子游戏. A.P. The alkaline nature of these solutions provides this group of metals with its name. Heating alkaline-earth metals in sealed glass vessels under a vacuum in the presence of a desired ligand alone or with a low-melting flux agent (e.g., 1,3,5-(t-Bu) 3 C 6 H 3, 1,2,4,5-Me 4 C 6 H 2) can generate base-free complexes. Calcium and barium metals due to their reactivity towards oxygen and nitrogen at elevated temperature have often being used to remove last traces of air from vacuum tubes. These metals are shiny and have silvery-white luster. Uses of Alkaline Earth Metals. Calcium is even more plentiful on Earth than magnesium. They readily react with oxygen, which accepts electrons to form ions with a 2- charge. In compounds, alkaline earth metals lose two electrons, forming ions with a 2+ charge. Required fields are marked *, 4) A suspension of magnesium hydroxide in water (called. Some compounds give off a great deal of light when heated, making them key ingredients in fireworks. , Your email address will not be published. She has started this educational website with the mindset of spreading Free Education to everyone. Alissa enjoys writing about life science and medical topics, as well as science activities for children. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Magnesium is useful in healthcare as it is one of the main ingredients in antacids, laxative and Epsom salts. Ore compounds containing beryllium, aluminum and silicon can form green and bluish-colored gemstones such as emeralds, aquamarine and alexandrite. Calcium and magnesium ions are an important component of human nutrition; calcium ions are necessary for healthy bones and teeth and magnesium ions are necessary for metabolism and muscle function. Beryllium increases the hardness of alloys that are used to make tools and watch springs. Salts derived from strontium compounds burn red and are used in fireworks and signal flares. The resulting compounds are called oxides. 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