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Till 20elememts write the no of electrons in outermost shell.if less than 4 then this is the valency otherwise subtract from 8
Borazole is very stable because it is aromatic; each nitrogen contributes two p electrons and each boron contributes zero electrons, for a total of six p electrons in the aromatic
Lithium hydration energy
Calculate equivalent weight of 99.22% purity of hexamethylene diisocyanate (HDI)?
#question.all questions under lanthanides and actinides.
Q. Explain Molarity and Replacement Reactions? Ans. Frequently in the chemistry lab we are confronted with situations where we are interested in the yield of a certain rea
The energy of electron in hydrogen atom in its grounds state is -13.6 eV. The energy of the level corresponding to the quantum number equal to 5 is: (1) -0.54 eV (2)
Anomalous behaviour of aluminium
Existence of positively charged nucleus was established by: (1) Positive ray analysis (2) α -ray scattering experiments () X-ray analysis (4) Discharge tube exper
Among the bonds formed by a chlorine atom with atoms of hydrogen, chlorine, sodium and carbon, the strongest bond is formed between (1) H- cl
i need email tutor who has good background on geopolymer cement to explain it for me such as the geopolymerisation process and fly ash composition by skype or Yahoo or hotmail i ne
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