[02:24.24]Helium is also used for cooling systems. [02:28.80]As fuel and oxidizer [02:31.32]are burned in the rocket's engines, [02:34.00]helium fills the resulting [02:36.40]empty space in the tanks, [02:38.72]ma...
Why the element having d^{10} configuration are not considered as transition elements? Describe the basic principle involved in the atomic force microscope. Why is iron more reactive than copper? Why are alloys produced? Defend and criticize Bohr's model. Why was it reasonable that such a mode...
Helium isn't the kind of element that makes friends easily. Being so light and non-reactive, there's little to stop the gas from diffusing out of exposed rocks into the atmosphere and drifting off into space. That makes helium a surprisingly rare material on the planet's surface. Yet jus...
Does helium and fluorine have a similar reaction? Helium is inert and does not readily react with other elements, including fluorine. Fluorine is a highly reactive element and will readily react with many other elements, but not with helium due to its stable electron configuration....
Why is helium considered a noble gas? Explain why beryllium and fluorine combine in a 1:2 ratio. Why are metals good conductors of electricity? Explain why group 7 elements react in a similar way with iron. Why is mercury the best element to use in florescent lights as opposed to other ...
heavier elements) as the electron velocity is directly proportional to Z and inversely proportional to n. From the above relationship, it is evident that for the element with Z > 137, velocity of the 1s electron (=Zcα = Zc/137) becomes higher than that of light but in terms of the ba...
Non-Reactive Gases If you take a close look at the periodic table, you'll notice a very special column all the way on the right hand side. In this column are some very unique elements called the noble gases. These are helium, neon, argon, krypton, xenon, and radon. All of the noble...
Helium is not a reactive molecule because Why is calcium placed in 2 group although it has completely filled orbitals? Why do halogens have high electron affinity? Why do metals and nonmetals form ionic compounds? Why does the fluorine atom tend to gain only one electron? What effect do val...
In chemistry, 8 isn’t a lucky number, per se, but, a number that indicates stability. The rule of 8 or theOctet ruleis the tendency of atoms to have eight electrons in their valence shell. Eight electrons in this final shell allow atoms to be stable and non-reactive. ...
whereas if it has a dotted border, it is radioactive, and if it contains dashes, it is a human-made element. A single thick line may appear in the middle of the periodic element in which the left-hand side is for metallic elements, and the right-hand side is for non-metallic element...