Which of the following statements are correct regarding orbits and orbitals?

(a) An orbit is a circular path where electrons revolve.
(b) An orbital is a 3D space with maximum electron probability (up to 90%).
(c) The maximum electrons in an orbit are 2n2.
(d) Orbitals are always circular in shape.
(e) Orbitals follow the wave nature of electrons and the uncertainty principle.

Options:

1. a, b, and c 2. b, c, and e
3. a, b,c and e 4. a, c, and d
Subtopic:  Bohr's Theory | Shell & Subshell |
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The angular momentum of an electron in an orbit of radius \(\mathrm{R}\) in a hydrogen atom is directly proportional to ____.
 
1. \(\mathrm{R}\) 2. \(\dfrac{1}{R}\)
3. \(\dfrac{1}{\sqrt{R}}\) 4. \(\sqrt{R}\)
Subtopic:  Bohr's Theory |
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Assertion (A): Angular momentum of the electron in the orbit that has four subshells is \(2h\over\pi\).
Reason (R): Angular momentum of the electron is quantized.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
Subtopic:  Bohr's Theory |
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