Many-electron atoms

When assigning electrons to orbitals, what rules must we follow?

• The Aufbau Principle

• The Pauli-Exclusion Principle

• The Hund's Rule

• the Aufbau Principle, the Pauli-Exclusion Principle, and Hund's Rule

What is the energy of an electron for each shell and subshell?

• 1s<2s<2p<3s<3p<4s<3d<4p....

• 1s>2s>2p>3s>3p>4s>3d>4p…

• 1s>2s>2p>3s>3p>3d>4s>4p…

• 1s<2s<2p<3s<3p<3d<4s<4p..

What is the meaning of the symbol “L”?

• Total Angular Momentum Quantum Number

• The Total Intrinsic Spin Quantum Number

• The Total Orbital Angular Momentum Quantum Number

The multiplicity of electrons in an atom is equal to:

•  M = -2S - 1

• M = 2S - 1

• M = 2S + 1

The selection rules apply only to atoms that can be described with Russell-Saunders (LS) coupling.

• False

• True