1
IIT-JEE 1993
Subjective
+5
-0
Estimate the difference in energy between 1st and 2nd Bohr orbit for a hydrogen atom. At what minimum atomic number, a transition from n = 2 to n = 1 energy level would result in the emission of X-rays with $$\lambda = 3.0 \times {10^{ - 8}}$$? Which hydrogen atom like species does this atomic number correspond to?
2
IIT-JEE 1990
Subjective
+3
-0
According to Bohr's theory, the electronic energy of hydrogen atom in the nth Bohr's orbit is given by $${E_n} = {{ - 21.6 \times {{10}^{ - 19}}} \over {{n^2}}}J$$. Calculate the longest wavelength of light (in Å) that will be needed to remove an electron from the third Bohr orbit of the He+ ion.
3
IIT-JEE 1985
Subjective
+2
-0
Give reasons why the ground state outermost electronic configuration of silicon is:

4
IIT-JEE 1984
Subjective
+3
-0
The electron energy in hydrogen atom is given by E = (-21.7 $$\times$$ 10-12)/n2 ergs. Calculate the energy required to remove an electron completely from the n = 2 orbit. What is the longest wavelength (in cm) of light that can be used to cause this transition?
Questions Asked from Structure of Atom (Subjective)
Number in Brackets after Paper Indicates No. of Questions
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