Already have an account? Get multiple benefits of using own account!
Login in your account..!
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
FULLERENE: The fullerene is a cage like hollow molecules composed of hexagonal and pentagonal groups of atoms, and especially those formed from carbon, that constitute the third form of carbon after diamond and graphite. However the term has been widened to contain any closed cage structure having more than twenty carbon atoms including completely of three coordinate carbon atoms. A, hollow pure carbon molecule in which the atoms positioned at the vertices of a polyhedron with 12 pentagonal faces and any number (other than one) of hexagonal faces. The fullerene is a just revealed family of carbon allotropes (any two or more forms of the same chemical element) named after the sheet from being planner.
STRUCTURE AND PROPERTIES: - In the fullerene molecule an even number of carbon atoms are arranged over the surface of a closed hollow cage. Each atom is trigonally linked to its three near neighbours by bonds that delineate a polyhedral network, consisting of 12 pentagonal and n hexagons (n may be any number other that one including zero). All 60 atoms in fullerenes 60 are equivalent and lie on the surface distributed with the symmetry of a truncated icosahedrons (an icosahedrons is a polyhedron having 20 faces, but usually a regular icosahedrons is meant, which has faces which are equilateral triangles). The 12 pentagons are isolated and spread symmetrically among 20 linked hexagons. Solid C60 exhibits interesting dynamic behaviour in that at room temperature the individual round molecules in the face centred cubic crystals are rotating isotropic ally (that is freely) at around 108Hz. At around 260k (8.3F) there is a phase transition to a simple cubic lattice accompanied by an abrupt lattice contraction rotation is no longer free, and the individual molecules make rotational jumps between two favoured (relative) orientations configurations, in the lower energy one a double bond lies over a pentagon, and in the other it lies over a hexagon. At 900k (-300 F) the individual molecules stop rotating altogether, freezing into the orientation ally discovered crystal involving a mix of the two configurations.
how CPH is able produce all bosons? Answer; the fermions produce their bosons. Look at the pair production that before of pair there is not boson, however after pair bosons app
(i) Effect of temperature: (a) In general elasticity reduces as the temperature increases. (b) Invar is an exception. There is no effect of temperature on elasticity of in
It is the lowest temperature at which a flammable liquid can form an ignitable mixture with air. At this temperature the vapour may cease to burn when the source of incitation is r
Iron pan This is useful for many experiments in chemistry. The lid of a preserving jar is looped with galvanized wire. The free end of the wire is embedded in a piece of wooden
Precaution to minimize Radiation Danger: 1. One should keep safe distance away from radiation emitting source. 2. The radiation from the reactor are shielded by thick concr
what are the type and classification
With mans lust for the unknown in space exploration, what will happen to our planet by removing so much weight in the form of spacecraft that will never return and can the earth re
what is total internal reflection ?
What is incorrect with this picture? Answer: The Current is the flow rate of charge. When the charge obtains to the junction of three wires (including the wire the
Question: In diffraction experimentation monochromatic light which passes through a single slit illuminates a screen. A pattern of fringes seems on the screen. The pattern comp
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd