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Q. What do you mean by Isotopes?
Isotopes and mass number although all atoms of an element have the same number of protons most elements have atoms with different numbers of neutrons. For instance because the atomic number of hydrogen is one all atoms of hydrogen must have one proton (and one electron). Nevertheless hydrogen atoms are able to have different numbers of neutrons. Around 99985 out of every 100000 naturally occurring hydrogen atoms have no neutrons. But the remaining 15 out of every 100000 hydrogen atoms have one neutron. Atoms with the similar number of protons but different numbers of neutrons are called isotopes. Hydrogen has two naturally taking place isotopes.
Physical properties of Benzaldehyde (a) It is a colourless oily liquid. The boiling point of it is 179° C. (b) Benzaldehyde has smell of bitter almonds. (c) Benzaldehyde
how was the magnitude of electric charge concluded?
A house is air conditioned using solar energy. Solar radiation heats a pressurized tank such that the temperature is maintained at 175 o C. 1500 kJ must be extracted from the hou
Distillation under reduced pressure - Purification of organic compounds This process is employed for the purification of high boiling liquids and liquids that decompose at o
Which processes is used to harden a steel? Quenching process is used to harden the steel
Q. What is the Electrometallurgy? The above two metallurgical processes, namely pyrometallurgy and hydrometallurgy can be used in the extraction of a fairly large number of met
Which statement is not correct for n=5, m=3: (1) l=4 (2) l=0, 1.3, s =+1/2 (3) l= 3 (4) All are correct Ans:l=4
what are the advantages of stripping methods over voltammetric procedures?
similarities between the latter actinides and latter lanthanides
Q. Describe the Freezing - Techniques of preservation? This is a method of preservation using low temperature. The chief preservative effect of freezing lies in the inability o
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