Ferromagnetic materials owe their properties to __________________ inner sub-shells ?
Correct answer: B. Partially filled
- A. Completely filled
- B. Partially filled
- C. Equally filled
- D. Vacant
Explanation
Ferromagnetism results from unpaired electrons in partially filled d or f subshells, whose magnetic moments can align in domains. Completely filled subshells generally have paired electrons and no net magnetic moment.
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