What are transition element

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What are transition element: 





  The elements occupying the position in the middle of the periodic table whose inner d-or f- orbitals are not completely filled are called transition elements. The transition element is one whose atom or at least one of its ions has incompletely filled d-or,f-orbitals. In case of transition elements, it's atom or simple ion contains 1 to 9 electrons in d - orbitals or 1 to 13 electrons in f-orbitals. Transition elements (d-or f-block elements) present between s - and p - block elements. Thus, it follows that the elements undergoing change of state from highly  electro positive elements (metals) of s - block to highly electronegative elements (non - metals) of p - block .

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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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F - block element What are f - block elements

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