Today,our currency(货币) is a mixture of metal coins and paper money,but it wasn't always that way.Before metal coins and paper bills existed(存在),people used a lot of unusual things to buy what they needed.In one
The oldest coins are over 2,500 years old, so we know that people used coins a very long time ago. At first, people used precious metals, such as gold and silver, to make coins. They stamped the shape of a person or animal on each coin to indicate its value. In the 13th century...
When alloys are specified, the specification often includes the ratios of the different metals in that particular alloy.These different types of mixtures are interesting but might not be essential knowledge for GCSE Chemistry. The descriptions are non-technical (omitting details, e.g. of particle ...
What is a mixture of copper and tin called?AlloysWhen a metal is mixed with another element, it forms an alloy. Alloys are generally stronger and resist corrosion better than the metal alone. The alloy can be made of a metal and a nonmetal or two metals. For example, steel is an ...
A homogeneous mixture of a metal with other metals 01:58 Alloys are homogeneous mixtures of a metal with a metal or non-metal. ... 01:44 Alloys are homogeneous mixtures of a metal with a metal or non-metal. ... 02:26 Metals combine with other metals to form homogenous solid mixtures...
Several solid metals can be melted together to make a new solid. This is called an alloy. Metal alloys are unique because the combined properties of the metals in the mixture are often more desirable than any of the single elements that are in the alloy....
a mixture of metals 合金 合金a mixture of metals 更多(+20) 添加示例 在上下文、翻译记忆库中将“mixture"翻译成 中文 变形 干 Throughout the module, the interaction was lively, and both the subject matter and the mixture of presentation formats were very well received by the participants ...
However, when some main constituents are known to occur, the analysis gains accuracy (and may be easier) if the known component is removed; this is particularly important in the case of water vapor, which may condense on the instruments, or constituents when the molecular behavior may ...
When the components of the mixture formed are uniformaly distributed through out it there it is called……….. Mixture.
matte - a mixture of sulfides that forms when sulfide metal ores are smelted oxyacetylene - a mixture of oxygen and acetylene; used to create high temperatures for cutting or welding metals mineral jelly, petrolatum, petroleum jelly - a semisolid mixture of hydrocarbons obtained from petroleum; ...