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Q. Explain about Atomic Radius?
The atomic size decreases with increase in atomic number along any period in the long form of the periodic table due to increase in effective nuclear charge. Though, the decrease in atomic radius is small when the difference in electronic configuration from one element to the next is that of an additional inner electron. This is due the additional inner electron screens the size-determining outer electrons from the nucleus much better than an additional outer electron. For example, decrease in the covalent radius from Sc to Zn; i.e., across ten elements of the 3d transition series, is 19 pm. this. Decrease is almost one-third of the decrease in the covalent radius of the seven elements of s and p blocks of the period 3.
Ethelene+diaminotetraacetate---->1,4- diaminobutane from ethylene CH 2 =CH 2 +EDTA---->NH 2 -CH 2 -CH 2 -CH 2 -CH 2 -NH 2
physical properties of acid amide
For the dumb-bell shaped orbital, the value of l is: (1) 3 (2) 1 (3) 0 (4) 2 Ans: 1
The number of electrons which can be accommodated in an orbital is: (1) One (2) Two (3) Three (4) Four Ans: Two
formula of alocholic acidity
A solid substance with a mass of 200g is at its melting temperature in a calorimeter. While the substance changes from a solid to a liquid at the same temperature, the 400-gram mas
Normal 0 false false false EN-IN X-NONE X-NONE p x orbital can accommodate : (1) 4 electrons
which of the following is not a characteristic of plunck''s quantum theory of radiation? A) Radiation are associated with energy B) A body can emit less or more than a quantum of e
0.45 g of anhydrous oxalic acid is reacted with 50 ml of KMNO4 . Then normality of KMnO4 is??
Sphere packing Element structures where chemical bonding is nondirectional are best explained by considering the packing of equal spheres. Close-packed structures are on
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