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Bohr's radius can have:
(1) Discrete values
(2) +ve values
(3) - ve values
(4) Fractional values
Ans: +ve values
Q. Describe about groups or families in periodic table? Every element may be represented by a one or two letter symbol. In the middle of nineteenth century a Russian chemist Dm
separation of metal
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Which of the following set of quantum number is not possible: n l m1 m2 (a) 3 2 1
advantages and disadvantages of surfaces tension
The four quantum numbers of the outermost orbital of K (atomic no. =19) are: (1) n= 2, l= 0, m=0, s= +1/2 (2) n= 4, l= 0, m=0, s= +1/2 (3) n= 3, l= 1,
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Q. What is the use of Gallium? Gallium is mainly used in semiconductor technology. It is used for doping other semiconductor and in solid state devices such as transistors.
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