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Which of the following has the least energy:
(1) 2p
(2) 3p
(3) 2s
(4) 4d
Ans: 2s
In Bohr's model, atomic radius of the first orbit is γ the radius of the 3rd orbit, is: (1) γ/ 3 (2)γ (3) 3γ (4) 9γ Ans: 9γ
Ionization energy of group: Why does Ionization energy of group IIA elements decrease from Be to Ra? A. As the atomic size increases from Be to Ra, the attraction between
Cast iron is iron or a ferrous alloy which has been heated until it liquefies, and is then poured into a mould to solidify. It is usually made from pig iron. The alloy constituents
simple method of synthesis of the above chemical with highest yield.
name and chemical formula of blue vitriol
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Q. What is law of definite proportions? A given compound is forever composed of the same elements in the same proportion by mass. This fact is recognized as the law of definit
Q. Calculate the Slope of a Line from Data Points? Compute the slope of a line that contains these data points (3.0 cm 3 , 6.0 g) and (12 cm 3 , 24 g). To compute the slope of
By who can sublimation be useful? How can it be useful?
unique properties of colloids
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