orbital

; 6s < 4f < 5d < 6p < 7s etc. Step 3: Fill Orbitals According to Hund’s Rule and Pauli Exclusion Fill orbitals singly with electrons of parallel spins before pairing. Each orbital can hold a maximum of

tions? Transition metals have similar electron configurations because their d-orbitals are being filled, and they tend to have electrons in the (n-1)d and ns orbitals, leading to comparable valence electron arrangements. What is the relatio