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GROUP 13: ALUMINUM TO THALLIUM The substance aluminum, indium, gallium and thallium have valence electron configurations (ns) 2 (np) 1 and for the lighter elements their chemis
What do you mean by limiting diffusion current in polarography
If hydrogen atom is in an energy level represented by n=4,how many spectral lines are possible in its emission spectrum? Ans) There is a formula for this i.e [ (n 2- n 1 +1)
When does intrinsic semiconductor become an extrinsic semiconductor? Illustrate. Semiconductor doping is the process which changes an intrinsic semiconductor to an extrinsic se
name given to substance combination
Measure the combustion energies for the burning of 1 mol of propane and butane gas in air under these conditions. Calculate the efficiency of the combustion process as a functi
#question. CH3CH=CHCH +Br2 ___ .
Energy of electron of hydrogen atom in second Bohr orbit is: (1)-5.44x10 -19 j (2)- 5.44x10 -19 kj (3)-5.44x10 -19 cal
Antibiotics: A chemical substance generated by or derived from living cells that is able of inhibiting the life procedures or even destroying micro-organism is known as Antibio
what are the problem when use chemical in food
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