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The energy of an electron in orbit of hydrogen atom is : (1) 13.6/n 4 x eV (2) 13.6/n 3 xeV (3) 13.6/n 2 xeV (4)13.6/nx eV Ans:
The nucleus of an element contains 9 protons. Its valency would be : (1) 1 (2) 3 (3) 2 (4) 5 Ans: 1
Q. What are Changes in Matter? Matter is able to undergo two fundamental kinds of changes. Changes that don't alter the composition of matter are called physical changes. Sta
sir to calculate first order reaction the formula is
account for the effects of solvents on the wavelength of absorption of the acetone in terms of the hydrogen bonding properties of the solvent used
Lanthanide contraction
Reaction of conjugate addition This reaction is a "conjugate addition" of cyanide ion on a cyclopropane. Notice that reaction at the least branched carbon of the cyclopropane
Merits of atomic fluorescence spectrometry technique: The merit of the AFS methods lies within the greater sensitivity achievable because of low background and interference.
my question is sodium carbonate is widely used in the manufacture of products such as glass, bread, water softeners and soaps. most sodium carbonate is produced industrially using
similarities between the latter actinides and latter lanthanides
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