Ví dụ về việc sử dụng Beryllium trong Tiếng anh và bản dịch của chúng sang Tiếng việt
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Beryllium compounds are toxic if inhaled or ingested.
So far,they have only been used to simulate small molecules, like beryllium hydride(BeH2), for example.
Beryllium bromide is the chemical compound with the formula BeBr2.
It can be prepared by reacting beryllium metal with elemental bromine at temperatures of 500 °C to 700 °C.
Beryllium chloride is an inorganic compound with the formula BeCl2.
For example, the electron configuration of beryllium, with an atomic(and electron) number of 4, is 1s22s2 or[He]2s2.
Beryllium has four electrons, two in the 1s orbital and two in the 2s orbital.
The price on the US market for vacuum-cast beryllium ingots was 338 US$ per pound($745/kg) in 2001.
In fact, beryllium is only made in supernova explosions.
Alkaline-earth metals:The alkaline-earth metals make up Group 2 of the periodic table, from beryllium(Be) through radium(Ra).
ASSAB MM 40 is Beryllium Copper mould alloy supplied at approx 40 HRC.
These objects are made from substances such as glass, alumina, zirconia, silica, magnesia,lime, beryllium oxide, and ferric oxide.
Beryllium chloride is prepared by reaction of the metal with chlorine at high temperatures:[2].
The most popular alloy in the copper beryllium family is UNS C17200 and is commonly known as beryllium copper Alloy 25.
Beryllium chloride is a Lewis acid and has been used as a catalyst in some organic reactions.
While casting Nickel Chrome alloys that don't contain Beryllium, the surface of the melting alloys will appear a layer of shadow.
Beryllium enters the air, water and soil as a result of natural processes and human activities.
The price on the American market for vacuum-cast beryllium ingots was about $338 per pound($745 per kilogram) in 2001.
Beryllium hydride reacts slowly with water but is rapidly hydrolysed by acid such as hydrogen chloride to form beryllium chloride.[1].
Nicholas Louis Vauquelin was first to confirm the presence of beryllium in emerald, but he had been unable to separate it from its oxide.
The natural pure beryllium hydroxide is rare(in form of the mineral behoite, orthorhombic) or very rare(clinobehoite, monoclinic).
They successfully simulated atomic bonding in beryllium hydride(BeH2), the most complex molecule ever simulated by a quantum computer.
Beryllium chloride is used as a raw material for the electrolysis of beryllium, and as a catalyst for Friedel-Crafts reactions.
Today it is proven that substances such as arsenic, beryllium, asbestos, hydrocarbons, chromium and nickel are also capable of provoking the growth of tumor cells.
Beryllium is sometimes used in neutron sources, in which the beryllium is mixed with an alpha emitter such as 210Po, 226Ra, 239Pu or 241Am.
Anders Gustav Ekeberg isolated beryllium from the gadolinite but failed to recognize other elements ore contained.
Beryllium hydride(systematically named poly[beryllane(2)] and beryllium dihydride) is an inorganic compound with the chemical formula(BeH 2)n(also written([BeH 2])n or BeH 2).
The main Aluminum Alloy beryllium, Beryllium Copper Alloy, beryllium and beryllium Titanium nickel alloy composite material.
Because beryllium tends to exist in solution at pH levels less than about 5.5(and most rainwater has a pH less than 5), it will enter into solution and be transported to the Earth's surface via rainwater.