10 Copper is a metal. The structure of copper is described as a lattice of positive ions in a‘se a of electrons'.Which statement/s below about copper is/are correct? D1 Copper conducts heat because the positive ions are free to move.2 Copper conducts heat because the electrons are ...
Coins have been made of gold silver copper aluminum nickel lead zinc plastic and in China even from tea leaves. Most governments now issue paper money in the form of bills which are really “promises to pay”. Paper money is obviously easier to handle and much more convenient in the modern...
Frank Holmes
In its ionic state, copper (Cu) can have either a +1 or a +2 charge. Copper is a transition metal, which means it can exhibit variable valency and form ions with partially filled d orbitals. A neutral copper atom has an atomic number of 29 and a total of 29 electrons. Its electron...
Copper powder 99.99% Copper is widely used in powder metallurgy, electrocarbon products, electronic materials, metal coatings, chemical catalysts, filters, heat pipes and other electromechanical components, as well as in the field of electronic aviation Appearance and Property...
A。此题考查演绎推理。因为金属导电,铜是金属,所以铜导电,A 选项 conducts 正确,B 选项 doesn't conduct 意思是不导电,不符合推理;C 选项 conduct 形式错误,主语 copper 是第三人称单数,要用 conducts;D 选项 don't conduct 形式错误且意思不符合推理。反馈...
Copper is an essential metal in the motors,wiring,radiators, connectors,brakes, an d bearings use d in cars an d trucks. The excellent mixing natures of copperhave made it priceless when combine d with other metals, such as zinc(to form brass),tin (to form bronze), or nickel. _4 And...
Is copper sulfate a metal? What does a subscript indicate in a chemical formula? What is a copper and zinc alloy? What is the product of the reaction between copper and oxygen? What is a nuclide symbol? What chemical element is Pd?
Copper is an important metal and does not occur in nature in its pure form. It has excellent heat conductivity. Copper reacts with the oxygen present in the air and thus further leads to corrosion. It turns green in colour and stops corroding further. It is reddish in colour in normal fo...
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