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Because it is chemically inert, it is also used as a gas shield in robotic arc welding and as a non-reactive atmosphere for growing silicon and germanium crystals used to make electronic semiconductor devices. Liquid helium is often used to provide the extremely low temperatures required in ...
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...
The preferred material for the envelope is generally quartz, since glass is unable to sustain the temperature at which the filament operates (up to 2,500 degrees Celsius), while the inert atmosphere is made of a mix of argon and nitrogen, and a small amount of a halogen element, such as...
Helium tanks can’t explode. Helium is unlikely to catch fire because it is not a reactive element. So if helium cannot support fire, a helium tank will unlikely explode. Since helium is so stable, it can put out fires. A burst disc seals the helium tank. If the helium tank is placed...
[01:03.36]Helium's atomic number is 2, [01:06.44]making it the second lightest [01:08.88]element after hydrogen. [01:11.36]Rockets need to reach exact speeds [01:14.44]and altitudes to maintain their orbits. [01:18.16...
Janssen recorded the helium spectral line during the solar eclipse of 1868, while Lockyer observed it from Britain. Lockyer was the first to propose that the line was due to a new element, which he named. The formal discovery of the element was made in 1895 by chemists Sir William Ramsay,...
Become a Study.com member to unlock this answer! Create your account View this answer The answer to this question can be divided into metal and nonmetal elements. The most reactive nonmetal element is fluorine (F). It is located near... See full answer below....
faqs concept of valency noble gases have a completely filled outermost shell and that’s why they are least reactive. other element’s reactivity depends upon their ability to attain the noble gas configuration. in this section, we shall learn more about the valency of an atom. if the ...
Francium is a radioactive element that often forms as part of the decay chain for the element actinium. It is characterized by having 87 protons in its nucleus and no known stable isotopes.Answer and Explanation: Become a Study.com member to unlock this answer! Create your account View ...