Practice Energies Of Orbitals (2.6.3) - Structure of Atom

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6 sample questions

Question 1.
What is the principal quantum number (n)?
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Think about how electrons orbit the nucleus.
Question 2.
What does the Pauli Exclusion Principle state?
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Consider what happens when two electrons share an orbital.
3Question 3.
What determines the energy levels of electrons in a hydrogen atom?
- Principal quantum number
- Azimuthal quantum number
- Both
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Think about the levels of orbitals in hydrogen.
4Question 4.
Is it possible for two electrons to occupy the same orbital without any restrictions?
- True
- False
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Recall Pauli's rule on electrons in orbitals.
Question 5.
Calculate the effective nuclear charge (Z_eff) experienced by a 3p electron in sodium (Na). Given, Z = 11 and shielding constant S = 8.
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Use the formula for Z_eff.
Question 6.
Explain why elements like Chromium preferentially adopt the electron configuration [Ar] 3d5 4s1 rather than [Ar] 3d4 4s2.
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Consider the stability associated with filled and half-filled configurations.

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