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The principle that goes against the concept of Bohr's fixed orbits is the Heisenberg Uncertainty Principle. This principle states that it is impossible to simultaneously know both the exact position and momentum of a particle, such as an electron in an atom. Bohr's model assumes that electrons can occupy fixed orbits with precise positions and momenta, which contradicts the uncertainty principle. As a result, more advanced quantum mechanical models, like the Schrödinger equation, provide a better description of electron behavior in atoms.
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Why does the concept of Bohr orbits violate the uncertainty principle?
The Bohr Model of a single-electron atom assumes that the energy levels of electron orbits are fixed due to the quantization of angular momentum of the electron while in orbit. The problem occurs because angular momentum depends on both the radius of the orbit and the velocity of the electron in that orbit. If one or the other is uncertain, then it is impossible to know the angular momentum. Heisenberg showed that either one or the other MUST be uncertain. If we are certain about the radius, we MUST have uncertainty about the velocity -- and vice-versa. Thus, angular momentum of an orbting electron can NOT be quantized, because it can not be known.
What principle do scientist rely on in the latest model of the atom?
In the latest model of the atom, scientists rely on the principles of quantum mechanics, which describe the behavior of subatomic particles as both particles and waves. This model incorporates the concept of probability, where the position of electrons is defined by electron clouds or orbitals rather than fixed orbits. Additionally, the uncertainty principle highlights the limits of simultaneously knowing an electron's position and momentum, emphasizing the fundamental unpredictability in atomic-scale phenomena.
Did niels bohr discover orbits of electrons?
Yes, Niels Bohr proposed the idea of quantized electron orbits around the nucleus in his atomic model in 1913. He suggested that electrons can only occupy specific quantized orbits with fixed energy levels.
What causes the planets to revolve in fixed orbits?
Planets revolve in fixed orbits primarily due to the gravitational force exerted by the Sun, which pulls them towards it. This gravitational attraction, combined with the planets' initial velocity, creates a balance that results in stable, elliptical orbits, as described by Kepler's laws of planetary motion. Additionally, the conservation of angular momentum ensures that the planets maintain their orbits over time, preventing them from spiraling into the Sun or drifting away into space.
Which of Bohr' s contributions are present in the modern atomic model?
Bohr's contributions that remain in the modern atomic model include the concept of quantized energy levels for electrons, which are foundational to understanding electron configurations in atoms. His idea that electrons occupy specific orbits around the nucleus, with defined energy states, laid the groundwork for the development of quantum mechanics. Additionally, Bohr's principle of quantization helps explain phenomena such as atomic spectra, which are still essential in modern atomic theory. However, the modern model incorporates wave-particle duality and probabilistic electron distributions, moving beyond Bohr's fixed orbits.
What scientist suggested that electrons have fixed orbits?
Niels Bohr proposed the idea that electrons have fixed orbits around the nucleus of an atom in his model of the atom in 1913. This concept helped to explain the stability of atoms and the spectral lines observed in hydrogen.
Why does the concept of Bohr orbits violate the uncertainty principle?
The Bohr Model of a single-electron atom assumes that the energy levels of electron orbits are fixed due to the quantization of angular momentum of the electron while in orbit. The problem occurs because angular momentum depends on both the radius of the orbit and the velocity of the electron in that orbit. If one or the other is uncertain, then it is impossible to know the angular momentum. Heisenberg showed that either one or the other MUST be uncertain. If we are certain about the radius, we MUST have uncertainty about the velocity -- and vice-versa. Thus, angular momentum of an orbting electron can NOT be quantized, because it can not be known.
What moved in fixed orbits around the nucleus in Bohr's model of a the atom?
Electrons moved in fixed orbits around the nucleus in Bohr's model of the atom. These orbits were quantized, meaning they had specific energy levels, and electrons could jump between these orbits by either absorbing or emitting energy.
What is a fixed percent of a principle?
It is a fixed rate of simple interest.
What principle do scientist rely on in the latest model of the atom?
In the latest model of the atom, scientists rely on the principles of quantum mechanics, which describe the behavior of subatomic particles as both particles and waves. This model incorporates the concept of probability, where the position of electrons is defined by electron clouds or orbitals rather than fixed orbits. Additionally, the uncertainty principle highlights the limits of simultaneously knowing an electron's position and momentum, emphasizing the fundamental unpredictability in atomic-scale phenomena.
What atom has an electron cloud instead of orbiting electrons?
All atoms of all elements have electrons in the electron cloud (better known as orbitals). The concept of orbits (electrons moving in fixed paths) is now replaced by orbitals.
What would happen if the planets did not move in their fixed path?
If the planets did not move in their fixed orbits they may dash each other.
How do the members of the solar system revolve around thr sun?
in fixed orbits
Why do the moon and stars wander with respect to the stars?
The moon and stars appear to wander against the backdrop of fixed stars due to their differing orbits and positions in our solar system. The moon orbits Earth, completing a cycle approximately every 29.5 days, which causes it to change its position relative to stars each night. Similarly, planets, which are also considered "wandering stars," move along their own orbits around the sun, resulting in their apparent motion against the more distant, fixed stars. This relative motion is a combination of the orbital mechanics of celestial bodies and the Earth's rotation.
What is the major difference the bohr model and the currently accepted atomic model?
Bohr assumed that electrons moved in fixed orbits.
What are epicycles?
In ancient astronomy, epicycles were imaginary circles within orbits used to explain the retrograde motion of planets. The concept was developed to account for the observed movements of planets in the sky.
Can earth bump into another planet?
NO. All the planets are in (more or less) fixed orbits.
