Chemistry: Quantum Numbers and Principles

Which of the following is a quantum number?

• Principal

• Angular momentum

• Magnetic

• Spin

The Pauli exclusion principle states that electrons in the same orbital must have ______ spins.

• parallel

• opposite

• identical

• random

According to Hund's Rule, orbitals of equal energy are occupied by one electron before any orbital is occupied by a second electron.

• True

• False

What does the angular momentum quantum number indicate?

• Size of the orbital

• Shape of the orbital

• Orientation of the orbital

• Spin of the electron

According to the Pauli exclusion principle, an orbital can contain a maximum of how many electrons?

• 1

• 2

• 3

• 4

The principal quantum number is denoted by which letter?

• n

• l

• m

• s

Which rule or principle is illustrated by the diagram showing 2px, 2py, 2pz orbitals?

• Hund's Rule

• Pauli exclusion principle

• Aufbau principle

• Heisenberg uncertainty principle

Fill in the blank: The electron configuration notation for Magnesium is ____.

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3p¹

• 1s² 2s² 2p⁶ 3p²

What is the noble gas configuration for Calcium?

• [Ar] 4s²

• [Ne] 3s² 3p⁶ 4s²

• [Kr] 5s²

• [He] 2s² 2p⁶ 3s² 3p⁶

Which quantum number describes the orientation of an orbital in space?

• Principal quantum number

• Azimuthal quantum number

• Magnetic quantum number

• Spin quantum number