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Each element has a unique number of protons. This unique number is known as the element's atomic number . All atoms of a given element have the same atomic number. For example:
The electronic configuration of a dipositive metal M 2+ is 2, 8, 14 and its atomic weight is 56 a.m.u. The number of neutrons in its nuclei would be: (1) 30 (2)32
Rutherford's experiment on scattering of particles showed for the first time that the atom has: (1) Electrons (2) Protons (3) Nucleus (4) Neutr
Q. What is basic diffrence between heat and temperature? Ans. Heat is energy which flows from hot objects to cooler ones. It flows because of the temperature difference betw
why is hcl used in acid radical
WHAT IS USE OF ION PAIR REAGENTS? The chemical substances that pair each other, to produces complexes. These can use for stabilization of one of the molecule that is more active
0.265g of an organic compound produced on evaporation 102cm^3 of vapour at 373k and 775mmHg.percentage composition of the constituents elements are 92.24 % of carbon and 7.76% of h
Why cyclo propane is more stable than cyclohexane
Q. What is basic need of SI Units? Ans: The Importance of Units Units give numbers a particular meaning. Example: I am 5 feet 10 inches tall. Feet and inches are units. I co
Illustrate the term Rolling with diagram A pair of cylindrical rollers made of iron or steel rotate in opposite direction with a gap between them which is smaller than cros
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