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When a hydrogen atom is raised from the groundstate to an excited state, [1995]
- a)P.E decreases and K.E. increases
- b)P.E. increases and K.E decreases
- c)both K.E. and P.E. decrease
- d)absorption spectrum
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
When a hydrogen atom is raised from the groundstate to an excited stat...
and 
where,r is the radius of orbit which increases as we
move from ground to an excited state.
Therefore, when a hydrogen atom is raised
from the ground state, it increases the value
of r. As a result of this, P.E. increases
(decreases in negative) and K.E. decreases.
Most Upvoted Answer
When a hydrogen atom is raised from the groundstate to an excited stat...
Explanation:
When a hydrogen atom is raised from the ground state to an excited state, it undergoes a transition where the electron moves from a lower energy level to a higher energy level. This transition is accompanied by changes in both potential energy (P.E.) and kinetic energy (K.E.) of the atom.
Potential Energy:
- The potential energy of an electron in an atom is related to its distance from the nucleus. In the ground state, the electron is in the lowest energy level, closest to the nucleus, and therefore has the lowest potential energy.
- When the electron is excited to a higher energy level, it moves further away from the nucleus. As a result, its potential energy increases because it is now at a greater distance from the positive charge of the nucleus.
Kinetic Energy:
- The kinetic energy of an electron is related to its speed or velocity. In the ground state, the electron is in a stable state with a specific speed determined by its energy level.
- When the electron is excited to a higher energy level, its speed increases because it is now in a higher energy state. Therefore, its kinetic energy also increases.
Summary:
- When a hydrogen atom is raised from the ground state to an excited state, the potential energy of the electron increases because it moves further away from the nucleus.
- At the same time, the kinetic energy of the electron also increases because it moves at a higher speed in the excited state.
- Therefore, the correct answer is option 'B': P.E. increases and K.E. decreases.
Note:
- The absorption spectrum refers to the pattern of absorption lines observed when atoms or molecules absorb electromagnetic radiation. It is not directly related to the changes in potential energy and kinetic energy of an atom during an electronic transition.
When a hydrogen atom is raised from the ground state to an excited state, it undergoes a transition where the electron moves from a lower energy level to a higher energy level. This transition is accompanied by changes in both potential energy (P.E.) and kinetic energy (K.E.) of the atom.
Potential Energy:
- The potential energy of an electron in an atom is related to its distance from the nucleus. In the ground state, the electron is in the lowest energy level, closest to the nucleus, and therefore has the lowest potential energy.
- When the electron is excited to a higher energy level, it moves further away from the nucleus. As a result, its potential energy increases because it is now at a greater distance from the positive charge of the nucleus.
Kinetic Energy:
- The kinetic energy of an electron is related to its speed or velocity. In the ground state, the electron is in a stable state with a specific speed determined by its energy level.
- When the electron is excited to a higher energy level, its speed increases because it is now in a higher energy state. Therefore, its kinetic energy also increases.
Summary:
- When a hydrogen atom is raised from the ground state to an excited state, the potential energy of the electron increases because it moves further away from the nucleus.
- At the same time, the kinetic energy of the electron also increases because it moves at a higher speed in the excited state.
- Therefore, the correct answer is option 'B': P.E. increases and K.E. decreases.
Note:
- The absorption spectrum refers to the pattern of absorption lines observed when atoms or molecules absorb electromagnetic radiation. It is not directly related to the changes in potential energy and kinetic energy of an atom during an electronic transition.
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When a hydrogen atom is raised from the groundstate to an excited state, [1995]a)P.E decreases and K.E. increasesb)P.E. increases and K.E decreasesc)both K.E. and P.E. decreased)absorption spectrumCorrect answer is option 'B'. Can you explain this answer?
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