Chemistry Exam > Chemistry Questions > The principal quantum number describes ____a)...
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The principal quantum number describes ____
- a)energy and size of the orbit
- b)the shape of the orbital
- c)spatial orientation of the orbital
- d)the spin of the electron
Correct answer is option 'A'. Can you explain this answer?
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The principal quantum number describes ____a)energy and size of the or...
Among the four quantum numbers, the principal quantum number describes the size and energy of the orbit. It is represented by the symbol “n”. For shells, K, L, M, N and O, n is given by 1, 2, 3, 4 and 5.
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The principal quantum number describes ____a)energy and size of the or...
The principal quantum number describes energy and size of the orbit.
Explanation:
Principal Quantum Number (n) refers to the main energy level of an electron in an atom. It determines the energy and the size of the orbital where an electron is likely to be found. Here is a detailed explanation:
- Energy Level: The principal quantum number (n) indicates the energy level of an electron in an atom. The higher the value of n, the higher the energy level of the electron.
- Size of the Orbit: The principal quantum number also determines the size of the orbital or the distance of the electron from the nucleus. As the value of n increases, the distance of the electron from the nucleus also increases, leading to larger orbitals.
- Relationship to Atomic Structure: The principal quantum number plays a crucial role in understanding the electronic structure of an atom. It helps in determining the distribution of electrons in different energy levels and orbitals.
- Comparison with Other Quantum Numbers: While the principal quantum number describes the energy and size of the orbit, other quantum numbers such as the azimuthal quantum number (l) describe the shape of the orbital, the magnetic quantum number (m) describes the spatial orientation of the orbital, and the spin quantum number describes the spin of the electron.
In conclusion, the principal quantum number is a fundamental concept in quantum mechanics that helps in defining the energy levels and orbital sizes of electrons in an atom.
Explanation:
Principal Quantum Number (n) refers to the main energy level of an electron in an atom. It determines the energy and the size of the orbital where an electron is likely to be found. Here is a detailed explanation:
- Energy Level: The principal quantum number (n) indicates the energy level of an electron in an atom. The higher the value of n, the higher the energy level of the electron.
- Size of the Orbit: The principal quantum number also determines the size of the orbital or the distance of the electron from the nucleus. As the value of n increases, the distance of the electron from the nucleus also increases, leading to larger orbitals.
- Relationship to Atomic Structure: The principal quantum number plays a crucial role in understanding the electronic structure of an atom. It helps in determining the distribution of electrons in different energy levels and orbitals.
- Comparison with Other Quantum Numbers: While the principal quantum number describes the energy and size of the orbit, other quantum numbers such as the azimuthal quantum number (l) describe the shape of the orbital, the magnetic quantum number (m) describes the spatial orientation of the orbital, and the spin quantum number describes the spin of the electron.
In conclusion, the principal quantum number is a fundamental concept in quantum mechanics that helps in defining the energy levels and orbital sizes of electrons in an atom.
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The principal quantum number describes ____a)energy and size of the orbitb)the shape of the orbitalc)spatial orientation of the orbitald)the spin of the electronCorrect answer is option 'A'. Can you explain this answer?
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