Lesson Worksheet: Quantum Numbers Chemistry • 10th Grade

In this worksheet, we will practice assigning quantum numbers to atomic orbitals and relating these values to the orbital nodes, energies, and degeneracies.

Q1:

What percentage of the orbitals in the 𝑛=4 shell of an atom are d orbitals?

Q2:

What is the maximum number of electrons that can occupy a shell with 𝑛=5?

Q3:

How many degenerate orbitals are there in a subshell with the quantum numbers 𝑛 and 𝑙?

  • A2𝑙+1
  • B2𝑙1
  • C2𝑛+1
  • D2(𝑙+𝑛)+1
  • E2𝑛1

Q4:

How many subshells are there in a shell with the quantum number 𝑛?

  • A𝑛+1
  • B𝑛
  • C𝑛
  • D𝑛1
  • E𝑛1

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