compound = two or more elements chemically combined 2个或更多元素化学的合并，比如H2O, KCl mixture = two or more elements and/or compounds physically mixed together 2个或更多element/compound混合起来（不是化学物质），比如空气是N2, O2, CO2等各气体的mixture ...
Every element or compound……(2)音频:00:0000:49 Cooling the steam will cause it to condense back to a liquid -water. When H2O is at very low temperatures and pressures, and energy is added, solid ice can also...
Every element or compound can exist in every state of matter. The state that a material is in depends on how much energy it has. More energy means atoms and molecules move farther apart and usually become less den...
What chemical compound is formed when the fat reaches its smoke point? How is this formed? (What compound breaks down to form this?) The subscripts in the chemical formula for a molecular compound are not always in the lowest ratio. Using what you have learned about naming binary...
Classify each of the following materials as an element, compound, heterogeneous mixture, or homogeneous mixture. (a) concrete (b) clear apple juice (c) nitrogen (d) ozone Classification of Materials: Generally, materials are classified on the basis of their chemical and physi...
Blocks of Matter Matter may consist of elements, compounds, or mixtures. Element: a substance made of only one type of atom Compound: a substance made of two or more elements chemically bonded together. Mixture: a physical combination of two or more pure substances (i.e., elements or ...
By this process irradiation of H2, H2O, HF, HCl, HBr, or Hl causes only the molecules containing D to be dissociated to yield nascent D. The D may be recovered as D2 or the corresponding D compound depending on the temperature and pressure applied. Alternatively, an element or compound,...
The compound is so inert that it is used as a gaseous insulator, and rats allowed to breathe a mixture of SF6 and oxygen show no ill effects after several hours of exposure. This inertness is a result of the molecule having no vacant bonding site or unshared electron pairs on sulfur to...
As with any reactive element, sodium's character is changed completely when it's incorporated into a chemical compound. Let sodium, a reactive metal, and chlorine, a poisonous, choking gas, react with each other (which they do with a violent explosion) and the result is common table salt,...
What is a house cat's favorite chemical compound? MoUSe I would tell you a good element joke, but they ARGON!!! What do you call iron blowing in the breeze? Febreeze Silicon jokes: Q: Is silicon the same in Spanish? | A: Si ...