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Bohr model of an atom could not account for : (1) Emission spectrum (2) Absorption spectrum (3) Line spectrum of hydrogen (4)Fine spectrum Ans: Fine spectrum
Caesiurn chloride crystallises as a body centred cubic lattice and has a density of 4.0 g cm -3 . Calculate the length of the edge of the unit cell of caesium chloride crystal.
two oxides of a metal contain 27.6% and 30% oxygen. if the formula for the first oxide is m3o4 then what is the formula for the next oxide?
discovery of neutron becomes very late because
Explain Toluene Toluene has added stability associated with aromaticity; compound A, although conjugated, is not aromatic. Because any equilibrium favours the more stable comp
A 75g piece of Ag is heated to 80 degree celcius and drooped into 50g of water at 23.2 degree celcius.The final tempereture of Ag-H2O mixture is 27.6degree celcius.what is the spec
why is electron gain enthalpy of oxygen greater than sulphur?
Introduction Cluster and ring compounds arise in many areas of chemistry. Rings are most often built by nonmetallic elements with directional covalent bonding. They ad
what is the difference between acids, bases and alkalis?
The expression for Bohr's radius of an atom is: (1) r= n 2 h 2 / 4 Π 2 me 4 z 2 (2) r= n 2 h 2 / 4 Π me 2 z 2 (3) r= n2h2/4 Π me 3
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