Which substance is a good conductor of electricity? A. Glass B. Wood C. Metal D. Plastic 相关知识点: 试题来源: 解析 C。本题考查物质的导电性。Glass(玻璃)、Wood(木头)、Plastic(塑料)都是绝缘体,不导电;Metal(金属)是良好的导体。反馈 收藏 ...
A. Graphite B. Silicon C. Phosphorus D. Sulfur 相关知识点: 试题来源: 解析 A。题目中描述的元素是非金属且是良好的电导体。硅是半导体不是良好导体。磷和硫都是非金属但不是电导体。而石墨是非金属且是良好的电导体。反馈 收藏
Between each sheet, there are weaker (pi) bonds along which the electrons are free to move. It is the movement of electrons between the layers that explains this unusual property of graphite.Copper contains metallic bonds and so conducts electricity. Rubber contains covalent bonds and so does ...
It was one of the first metals mined in North America, where it was sought after especially for making shot. Properties and Isotopes Lead is a dense, relatively soft, malleable metal with low tensile strength. It is a poor conductor of electricity and heat. Lead has a face-centered cubic...
Which Metal is the Best Conductor of Electricity Metallic bonding causes metals to conduct electricity. In a metallic bond, atoms of the metal are surrounded by a constantly moving “sea of electrons”. This moving sea of electrons enables the metal to conduct electricity and move freely among ...
Conductivity is measured in mho. It is known that a solution of ionic salt in water also conducts electricity.Answer and Explanation: It is known that metals have free electrons which are allowed to flow. Metals provide less resistance to the flow of electrons. So they have...
Metal oxide is an important kind of catalyst, which has been widely used in the field of catalysis. The catalytic performance of metal oxide will be better after the metal oxide is nano-crystallized. It can be predicted that nano metal oxide will be an important direction of catalyst developme...
13. Linguistics A morpheme or morphemes regarded as a form to which affixes or other bases may be added. 14. Mathematics a. The side or face of a geometric figure to which an altitude is or is thought to be drawn. b. The number that is raised to various powers to generate the prin...
Copper is a chemical element, a reddish, extremely ductile (able to be drawn out into a thin wire) metal. It is an excellent conductor of electricity and heat. Where does copper come from? Copper is found in the free metallic state in nature. First used in 8000 BCE, it was a substitu...
Any material, not a steel, predominantly made of elemental iron. Wrought iron, ductile iron, cast iron, pig iron, gray iron Metal Crushed rock, stones etc. used to make a road. Iron (countable) A tool or appliance made of metal, which is heated and then used to transfer heat to somet...