题目 why some metals are better conductors of het then other希望用英语回答这道题 答案 为什么有些金属导体比其他更好.Metal conductor resistance is small,easy to install,easy molding相关推荐 1why some metals are better conductors of het then other希望用英语回答这道题 反馈 收藏 ...
(a) Explain why(i) metals are good conductors of electricity.(ii) insulators do not conduct electricity.[3] 相关知识点: 试题来源: 解析 (a) mark (i) and (ii) together:mention of free electrons(current is) flow/movement of free electronsinsulators contain no free electrons / metals contain...
Metals often make good conductors because the arrangement of their valence electrons allows them to pass easily from one atom to another. The opposite of a conductor is an insulator and these materials are used in a wide range of applications from houses, to wrapping electrical wiring, to potho...
Metals are good conductors of heat and electricity because they contain a glut of free electrons. These free electrons are able to move around freely and collide with one another, propagating heat and electricity through the metal. The majority of materials that conduct heat and electricity are m...
60年代国际经济合作 ___，既有技术层面的原因又有制度层面的原因。
Why are the noble metals gold, silver, and platinum are often used in fashioning jewelry? Zinc is used to make galvanized iron pipes. These pipes are protected from the rust reactions that would normally occur. Which statement best explains why zinc is used? a. Zinc is cheaper...
Why are metals good conductors of electricity? Sulfur deposits are mined by the Frasch process. Explain why free sulfur is not found on the earth's surface. Why does electroplating take place on the cathod...
The elements in the first two columns, or groups 1 and 2, tend to be very reactive and often form ionic bonds with the halogen gases in group seventeen. Periodic table of elements. Metals make up more than three-quarters of the elements....
While copper and silver are both more efficient electrical conductors than gold, that efficiency degrades as the connections tarnish and corrode. Gold connectors, however, do not tarnish or corrode. This makes gold the preferred choice for plating electrical connectors and in integrated circuits. ...
Why do metals only form ionic compounds while metalloids and nonmetals form ionic and covalent compounds? Why are metals good conductors of electricity? Explain what it means to say that a chemical is a 'good oxidizing agent'. Why are alkali metals very reactive?