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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.
The Carnot cycle consists of four processes in succession: 1. isothermal compression from T L , V 1 to T L , V 2 2. adiabatic compression from T L , V 2 to T H , V 3 3
H2,Li2,B2 each has bond order equal to 1 , the order of stability is
Bakelite: It is thermosetting plastics which are most widely used and the most important plastics. Preparation: It is formed by condensation reaction of phenol an
Consider the diols (containing 2 alcohol functional groups) of molecular formula C 5 H 12 O 2 (a) Illustrate all the possible structural isomers. (b) Label the stereogenic
Q. Illustrate phase diagram? Ans. There are two things which influence phase change: 1. The pressure exerted on the surface of a substance. 2. The addition or rele
what are the applications of borazole
Which of the following is always a whole number : (1) Atomic weight (2) Atomic radii (3) Equivalent weight (4) Atomic number Ans: Atomic number
which one will be chosen as cathode, Ag/Ag+ or Ag/Agi/i
Which one is the strongest bond: (1) Br- F (2) F-E (3) Cl-F (4) Br- Cl Ans: Br- F
conclusion topic
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