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Give example of Allotropy The element carbon has two common allotropes: diamond, where the carbon atoms are bonded together in a tetrahedral lattice arrangement, and graphite
How do you account for the following: (a) All scandium salts are white. (At. No. of Sc = 21) (b) The first ionization energies of the 5d transition elements are higher than
how many elements are discovered
The value of the energy for the first excited state of hydrogen atom will be: (1) - 13.6 ev (2)- 3.40 eV (3) -1.51eV
Two or more different types of monomers joined together to form giant molecule is called coopolymerisation. ex--- nylon6,6 --it is a combination of hexamethylenediamine and a
What is the diagonal relationship between Beryllium and Aluminium
what are the precedure of dillution and dissolution
A cylinder is equipped with a frictionless piston with an inner diameter of 5 cm and a mass of 3 kg. A 27 kg weight rests on the piston. One mole of helium at 25 o C fills the cyl
i. Talk about the terms "short circuiting" and "turbulence" in settling tanks under the following headings - causes, effects and design improvements/remedial calculates taken to av
A mylar novelty balloon is filled with 4.5 L of He at1 atm pressure and 23 degree Celcius temperature. It is then dipped into liquid nitrogen (77K) until the gas and balloon are a
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