Structure of Atom
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How does the quantum mechanical model describe electron location differently from Bohr's?
How does the quantum mechanical model describe electron location differently from Bohr's?
The quantum mechanical model of the atom is a significant shift from orbits to orbitals. Though Bohr's atomic model was the beginning of understanding of how electrons move in fixed circular paths, it was Heisenberg's Uncertainty Principle that changed the view. It showed exact positions and velocit
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How does the Bohr model contradict the Heisenberg Uncertainty Principle?
How does the Bohr model contradict the Heisenberg Uncertainty Principle?
Through Heisenberg's Uncertainty Principle, it's proven that you can't pin down where an electron is and how fast it's moving at the same time. The Bohr model did not look into this. The main reason for that thought was that it pictured electrons like little planets that would move in a loop around
Upvote Why is it that you cannot observe the wave properties of everyday objects?
Why is it that you cannot observe the wave properties of everyday objects?
De Broglie had the idea that everything that moves has a bit of wave behaviour. Technically, that includes any person, a football, and even a bus. The catch is that for big things, the mass is so large that their wavelength is insanely tiny. It's so tiny it's impossible to notice. That's
Upvote An accelerated electron has speed of 5×10⁶ ms⁻¹ with an uncertainty of 0.02%. The uncertainty in finding its location while in motion is x × 10⁻⁹m. The value of x is __________.
(Nearest integer)
[Use mass of electron = 9.1×10⁻³¹ kg, h = 6.63×10⁻³⁴ Js, π=3.14]
An accelerated electron has speed of 5×10⁶ ms⁻¹ with an uncertainty of 0.02%. The uncertainty in finding its location while in motion is x × 10⁻⁹m. The value of x is __________.
(Nearest integer)
[Use mass of electron = 9.1×10⁻³¹ kg, h = 6.63×10⁻³⁴ Js, π=3.14]
Δx . Δp = h/4π
Δx . mΔv = h/4π
Δv = 5 × 10? × 0.02/100 = 1000 m/s
∴ Δx = h/ (4πmΔv) = 6.63×10? ³? / (4×3.14×9.1×10? ³¹×1000)
= 5.8 × 10? m
= 58 × 10? m.
Upvote Given below are two statements:
Statement I: Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement II: Bohr's model of hydrogen atom contradicts Heisenberg's uncertainty principle.
In the light of the above statements, choose the most appropriate answer from the options given below:
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Given below are two statements:
Statement I: Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement II: Bohr's model of hydrogen atom contradicts Heisenberg's uncertainty principle.
In the light of the above statements, choose the most appropriate answer from the options given below:
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Rutherford atomic model can not explain hydrogen spectrum it is explained by Bohr's atomic model and from Bohr's atomic model, uncertainity principle can't be explained.
Upvote What is the role of Bohr's model in the development of quantum theory?
What is the role of Bohr's model in the development of quantum theory?
Bohr’s model played an important role in the development of quantum theory. It introduced the idea of quantised electron orbits. It disproved claims of classical mechanics, which predicted that electrons would spiral into the nucleus. Bohr proposed that electrons can exist only in specific, stable e
Upvote How can the existence of spectra help prove that energy levels in atoms exist?
How can the existence of spectra help prove that energy levels in atoms exist?
The existence of atomic spectra tells us that energy levels in atoms are quantised. When atoms absorb or emit light, they do so at specific wavelengths. They lead to line spectra instead of a continuous spectrum. Now, every line corresponds to an electron that transitions between fixed energy levels
Upvote How does Bohr's theory account for the stability of an atom?
How does Bohr's theory account for the stability of an atom?
Bohr's model solved the instability problem by proving about stationary states. In such stats, the electrons move in fixed orbits. They do not emit energy. This contradicted classical electromagnetic theory of Maxwell, which says accelerating charges should emit radiation and collapse into the nucle
Upvote Why was the Bohr model of the atom not useful for atoms other than hydrogen?
Why was the Bohr model of the atom not useful for atoms other than hydrogen?
Bohr's model is too simple for atoms beyond hydrogen. In multi-electron atoms like helium, it fails because it ignores a couple of aspects. First is the electron-to-electron repulsion, and second is the shielding effect, where inner electrons reduce the nuclear pull on outer ones. Due to both, orbit
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