Gold
黄金
 | Gold is a soft, very dense metal which is highly valued for use in jewelry and coinage. Called a "noble metal", it does not react readily in ordinary chemical reactions, so it can be found in essentially pure form as gold nuggets. It is also used in dental work because it can be precisely shaped and does not react chemically in the mouth. Its high electrical conductivity makes it valuable for tiny electrical contacts, and its very high reflectivity has led to use in thin films as a reflector.
金是一种柔软但非常密集的金属，因其在珠宝和货币中的广泛应用而备受珍视。被称为“贵金属”，它在普通化学反应中不易反应，因此可以以几乎纯度的形式作为金块存在。它还用于牙科修复，因为它可以精确塑形且在口中不发生化学反应。其高导电性使其在微小电气接触中具有价值，而其极高的反射率使其被用于薄膜中作为反射层。 |
Gold is bright yellow by reflected light, but in thin films may be blue or green.
黄金在反射光下呈明亮的黄色，但在薄 films 中可能呈现蓝色或绿色。
Gold is the most malleable and the most ductile of all metals. It can be hammered into sheets only 1/100,000 cm thick and drawn into wires 1/5000 cm in diameter.
金是所有金属中最为柔软和延展性最好的金属。它可以被锤打成厚度仅为1/100000厘米的薄片，并可拉制成直径为1/5000厘米的细丝。
Gold is often alloyed with copper, silver, palladium or other metals. The amount of gold in these alloys is described in carats. The carat value is the number of parts of gold in 24 parts of alloy, so that 24 carat gold is the pure metal. American coinage gold is 21.6 carat and British coinage is 22 carat.
黄金常与其他金属如铜、银、钯或其他金属合金。这些合金中黄金的含量用“克拉”来描述。克拉值是指在24份合金中含有的黄金份数，因此24克拉黄金即为纯金。美国的金币含金量为21.6克拉，英国的金币为22克拉。
White gold as used in jewelry is usually an alloy of gold and nickel.
珠宝用白金通常是一种金和镍的合金。
Gold is found in the mineral nagyagite, a sulfide, along with lead, iron, antimony, and tellurium. Tellurium combines with gold to form krennerite and calaverite, both with the empirical formula AuTe2. These two minerals are said to be dimorphs of each other. Gold and silver combine with tellurium to form the mineral sylvanite, AgAuTe4.
金存在于矿物 nagyagite（一种硫化物）中，伴生有铅、铁、锑和碲。碲与金结合形成 krennerite 和 calaverite，这两种矿物的化学式均为 AuTe₂。这两种矿物被认为是同质多形体。金和银与碲结合形成矿物 sylvanite，化学式为 AgAuTe₄。
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