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- Suppose we introduce the following pointdefects.(a) Mg2+ ions substitute for yttrium ionsin Y2O3; (b) Fe3+ ions substitute for magnesiumions in MgO;(c) Li1+ ions substitute for magnesiumions in MgO; and(d) Fe2+ ions replace sodium ions inNaCl.What other changes in each structuremight be necessary to maintain a chargebalance? Explain.9. In the graphic below we have two types of materials X and Y: i) a & b refer to material "X" in the absence of an external magnetic field and in the presence of magnetic field respectively. "c" refers to material "Y" with different domains having different orientations of electron spin and "d" refers to material "Y" under the influence of an external magnetic field. Identify whether (X or Y) is paramagnetic or ferromagnetic or neither. ii) ii) X: (a) (b) AAA. TTTTT Y: (c) (d)14. discussion on cis and trans potassium dioxalatodiaquachromate
- 2A Identify and justify which of the structure A or B are coordination structure of compound I. ody Hot g N HO | A B H-ZOWhat type of stochiometric defect is shown by (i) ZnS and (ii) CsCl?Solid CrF contains a Cr(III) ion surrounded by six F-ions in an octahedral geometry, all at distances of 190 pm. However, MnF3 is in a distorted geometry, with Mn–F distances of 179, 191, and 209 pm (two of each). Explain.
- XeF4 A O CCIA.B O Which molecule does not have (tetrahedral ) Td symmetry? SIFA .CO GEH4D OGive only typing answer with explanation and conclusion Calculate the coordination number of the following compounds by using its relation to its stoichiometry: i) KCl , C.N of K+: 6 ii) CaF2 C.N of F-: 4 iii) CsCl, C.N of Cs+: 8 iv) TiO2 : C.N of O2-: 3One of the following electron configurations for an ML6, first row d-block metal ion do you expect there to be an orbital contribution to the magnetic ?moment t2g 2 O t2g³eg? O t2g eg 2 O t2g 6 eg 1 O t2g
- (a) What kind of packing arrangement is seen in the accompanyingphoto? (b) What is the coordination numberof each cannonball in the interior of the stack? (c) Whatare the coordination numbers for the numbered cannonballson the visible side of the stack?8:10 E1 ll 92% 1) You 5 minutes ago 10. Discuss on the possible metals and their alloys which could be an ideal choice for replacement of finger joints. What are the relevant properties of this material?1. Apply Pauling's rules on the following and find anion and cation coordination. (a) MnO2 (b) TiO2 (c) KAISIO, (d) ВаTIO3 lonic radii of the elements are as follows: i. Mn – 54 pm ii. О - 140 pm Al – 57 pm Si – 41 pm ii. iv. v. К - 133 pm vi. Ва - 135 pm vii. Ti – 68