Electrical conductivity of metal

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Electrical conductivity of metal :

Metals are good conductor of electricity which is due to the presence of mobile electrons in the crystal lattice of the metals. It has been found that the increase of temperature decreases the electrical conductivity of metals. This is because increase of temperature increases the Kinetic energy of the metal atoms which start vibrating the Kernels of metal vigorously. This interacts with the movement of electrons and make its movement slow and thus conductivity decreases.

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Siemens Ozoniser how Siemens Ozoniser work

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Rutile structure

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Rutile structure: The radius radio is in the range 0.73 to 0.41. in rutile (TiO²) each Ti⁴+ ion is octahedrally surrounded by six O²- ions whereas each other O²- ion is surrounded by only three Ti⁴+ ions arranged at the tree corners of a plane triangle. The Co-ordination number of Ti⁴+ and O²+ ions are 6 and 3, respectively. It is not exactly a close packed structure. Ti⁴+ ions in rutile may however, be considered as forming a sufficiently distorted body centred cubic lattice.           Example  compounds  having radius ratio below 0.41 are SiO² and BeF² but these are only a few. The Co-ordination number of Si⁴+ and Be²+ is four and that of O²- is two. However, these are appreciably co-valent.
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Paramagnetic substances

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