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In Bohr's model, atomic radius of the first orbit is γ the radius of the 3rd orbit, is: (1) γ/ 3 (2)γ (3) 3γ (4) 9γ Ans: 9γ
why are orbitals occupied singly first befor the pairing of electron occurs
wive the most stable structure of hexene
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
Q. Define the Planck constant? The energy of a photon ( E photon) of a certain frequency (violet) is able to be calculated by using the following equation in which h represen
The standard free energy change for a reaction is -212.3 kJ mol -1 . If the enthalpy of the reaction is - 216.7 kJ mol -1 , calculate the entropy change for the reaction.
In lab, buffers solution based onto a 0.1 M solution of sodium phosphate at pH7.0. Within this system, there are three of pK A s like: 12.7, 7.21 and 2.12. Determine the conce
Q. Show the Colour of actinides and lanthanides Ions? Ions of actinides and lanthanides are coloured in the solid state as well as in aqueous solution, as is the case with the
Q. What do you mean by electro-magnetic radiation? In the untimely twentieth century scientists accepted the idea that an atom consisted of a massive positively charged nucleus
(a) Define the so-called 'colligative' properties, and write brief notes about each of them. (b) A system comprises two liquid components. State whether the system would be lik
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