Quantum Numbers & Electronic Configuration

Quantum Numbers are solutions of

• Heisenberg’s Uncertainty Principle

• Einstein’s mass energy relation

• Schrodinger’s Wave Equation

• Hamiltonian Operator

Which of the following quantum number gives the shape of

atomic orbital of sub-shell?

• n

• ℓ

• m_l

• m_s

Which of the following can be the quantum numbers for an

orbital?

• n = 4, ℓ = 4, m_ℓ = 3

• n = 2, ℓ = 3, m_ℓ = 1

• n = 3, ℓ = 2, m_ℓ = -1

• n = 3, ℓ = 0, m_ℓ = -3

“No two electrons in an atom can have the same set of n, ℓ, mℓ

and ms quantum numbers." This is a statement of

• Pauli exclusion principle

• Aufbau principle

• Hund’s rule

• Bohr’s theory

Element Z has the ground state electronic configuration 1s²2s²2p³.

Contains how many unpaired electrons in the outermost shell?

• 1

• 2

• 3

• 4

Give the ground state electron configuration for Beryllium (4 e^-) using spdf notation.

Give the ground state electron configuration for Silicon (14 e^-) using spdf notation.

A. Write the orbital notation

B. Identify if paramagnetic or diagmagnetic.

Sodium (11 electrons)

A. Write the orbital notation

B. Identify if paramagnetic or diagmagnetic.

Neon (10 electrons)

A. Write the orbital notation

B. Identify if paramagnetic or diagmagnetic.

Titanium (22 electrons)