Why do nonmetals tend to form anions when they react to form compounds? Why can't the halide ions be oxidizing agents? Why do metals only form ionic compounds while metalloids and nonmetals form ionic and covalent compounds? Why are metals good conductors of electricity?
Why is carbon black more electrically conductive than activated carbon? Why do magnesium and calcium have similar chemical properties? Explain why compounds are always homogeneous. Why is it important for people to avoid electric shocks? Why is graphite soft and slippery?
tends to decrease in non-polar solvents such as petrol, gasoline, etc. 4. conduction of electricity ionic compounds do not conduct electricity in the solid-state but are good conductors in a molten state. conduction of electricity involves the flow of charge from one point to another. in...
But unlike carbon, silicon ametalloid-- in fact, it's the most common metalloid on earth. "Metalloid" is a term applied to elements that are better conductors of electron flow -- electricity -- than nonmetals, but not as good as metals. ...
possible for the fabrication technology that produced the row and column matrix, is shown leaving it at a shallow angle. These form the rows and columns of a different type of row and column matrix that constitutes the main part of the chip. These conductors might be carbon nanotubes, for ...
另外汽车需要消耗大量的石油,我国是人均石油资源缺乏的国家,汽车拥有量的快速增加造成了巨大的能源压力 6th, protection environment.Because the automobile discharges exhaust air pollution.In the air pollutant, 39% carbon monoxide, 74.8% hydrocarbons, 46.2% nitrogen oxide compounds come from the vehicle ...
elements. b. compounds. c. mixtures.An alloy is a mixture of two or more elements that has metallic properties. Give the element symbol for the components of each alloy. a. white gold (gold, nickel, and palladium) b. bronze (copper and tin) c...
meaning organic structures exist with carbon at the core of other compounds in their bodies, as in sugar, and carbon also appears in the Earth's crust. Similarly, the gases hydrogen and oxygen form H20, or water, which makes up most of the Earth's surface and the bodies of many living...
Inhaling contaminants formed from chemicals like Sulphur (硫) dioxide, carbon and nitrogen oxides may irritate arteries (动脉) and increase inflammation. (长期暴露在这种污染中会增加患心脏病的风险。吸入由二氧化硫、碳和氮氧化物等化学物质形成的污染物可能会刺激动脉并增加炎症)”以及后文“Try to get ...
Due to their good wetting properties, the compounds of formula I typically form uniform continuous liquid films on substrates. After hydrolysis/thermolysis and, if desired, annealing, they are converted into thin uniform metal oxide films. Adhesion of the films to the substrate may depend on the ...