Why are metalloids between metals and nonmetals? Why is the periodic table called periodic? Is potassium-argon absolute dating? Why is einsteinium in the metal family? Why does the fluorine atom tend to gain only one electron? Why does germanium have metallic bonding?
Why is oxygen on the periodic table O? Why isn't it O2? Why don't electrons in atoms repel? On the basis of electronic structures, explain why most metal halides are ionic. Why does CrO3 in acidic water oxidize? Why are halogens diatomic while the elements of other groups are polyatomi...
Non-reducing agents don't have free ketone or aldehyde groups, and therefore contain an acetal instead of a hemiacetal. An acetal has two O-R groups, one –R group and a –H atom attached to the same carbon. (The key difference between an acetal and a hemiactal is that in a hemiacet...
The size of oxygen atom is quite small. The oxygen atoms can be linked to each other by double bond (O=O) because p pi-p pi bonding is possible in this case. Therefore, oxygen exists in the gaseous state as discrete molecules. Multiple bonding is not so
It is a very rare silvery-white metal. Rhodium actually holds the distinction of being the most expensive metal in the world! The appeal of this metal in the jewelry world is that it is highly reflective, and it is non-reactive (won't cause an allergic reaction). Rhodium was discovered ...
Sodium is high reactive element. If it is kept in open it can explosively react with oxygen to catch fire. Hence to prevent accidental damage sodium is immersed in kerosene oil.
is that antibacterial mechanisms for the GO-metal system contain two steps.First,electron transfer occurs from bacterium's cell membrane to GO surface which destroys the bacterial respiratory chain;subsequently,electrons on GO surface induce the production of reactive oxygen species (ROS) that damage ...
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dissolved oxygen (42.12 mg/L) in the reaction solution could be attributed to an increase in the lipid peroxidation of cell membranes, which proceeds via a free-radical mediated chain reaction, and because oxygen is required for its propagation, it accelerates when more oxygen is present in the...
M:It was giving me too much trouble．I was spending so much money on it that I was..．er..．spending more money than it was worth．Unfortunately, of course．When you actually sell the car, you've already ha, spent the money on it, so you lose both ways.W:What was wrong w...