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Questions and Answers
What defines the principal quantum number of an electron in an atom?
What defines the principal quantum number of an electron in an atom?
- The shape of the electron cloud
- The orientation of the orbital
- The spin of the electron
- The energy level of the electron (correct)
Which quantum number determines the shape of an orbital in an atom?
Which quantum number determines the shape of an orbital in an atom?
- Spin quantum number
- Magnetic quantum number
- Azimuthal quantum number (correct)
- Principal quantum number
Which electron configuration is correct for a chlorine atom with atomic number 17?
Which electron configuration is correct for a chlorine atom with atomic number 17?
- 1s² 2s² 2p⁶ 3s² 3p⁴
- 1s² 2s² 2p⁶ 3s² 3p⁶
- 1s² 2s² 2p⁶ 4s² 3p³
- 1s² 2s² 2p⁶ 3s² 3p⁵ (correct)
What is the maximum number of electrons that can occupy an s orbital?
What is the maximum number of electrons that can occupy an s orbital?
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Which of the following statements about orbitals is false?
Which of the following statements about orbitals is false?
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Study Notes
Principal Quantum Number
- The principal quantum number (n) describes the electron's energy level.
- Higher values of n correspond to higher energy levels.
- n can be any positive integer, such as 1, 2, 3, and so on.
Orbital Shape
- The angular momentum quantum number (l) determines the shape of an electron orbital.
- l values range from 0 to n - 1.
- l = 0 corresponds to an s orbital, which is spherical.
- l = 1 corresponds to a p orbital, which is dumbbell-shaped.
- l = 2 corresponds to a d orbital, which has more complex shapes.
Chlorine Electron Configuration
- Chlorine has 17 electrons.
- The correct electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁵.
Maximum Electrons in an s Orbital
- An s orbital can hold a maximum of 2 electrons.
False Statement about Orbitals
- The false statement about orbitals is that orbitals are circular paths around the nucleus.
- Orbitals represent regions of space where there is a high probability of finding an electron.
- The shape of an orbital is not a circular path, but rather a three-dimensional region of space.
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