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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
Q. How to calculate atomic mass of an element? Copper survive as a mixture of two isotopes. The lighter isotope (Cu-63) amid 29 protons and 34 neutrons makes up 69.17% of coppe
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Name the building blocks of lecithin. Show the head and tail structures of both lipids in the structure above. Lipids are substances that are soluble in organic solvent
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Diazomethane has the following composition by mass: 28.57% c ,4.80% h and 66.64% n . The molar mass of diazometane is 42.04 g/mol. Find the molecular formula of diazomethane and dr
What is the use of bhc
For cations build from metals in early groups in the periodic table the complexing strength with halide ions follows the sequence whereas with many post-transitio
The frequency of one of the lines in Paschen series of hydrogen atom is2.340x10 11 Hz. The quantum number n 2 which produces this transition is: (1) 6 (2) 5
Number of electron does species have The H2 2- ion can be conceived to result from the combination of two hydride ions (H-). This species have four electrons; two occupy the b
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