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Praseodymium–Neodymium (Pr, Nd) — rare‑earth magnets and spectral signatures: Multiple Choice
Preview · 11 questions
- 01Which rare-earth element is the primary constituent of commercial high-strength NdFeB permanent magnets?
- 02Which of the following is a typical lasing wavelength (approximate) of Nd3+ in solid-state lasers?
- 03Which rare-earth element tends to produce yellow-green coloration in glass and ceramics when present as the trivalent ion?
- 04Praseodymium-doped solid-state lasers are notable for emitting primarily in which region of the spectrum?
- 05Which oxidation state is the most common and stable for both praseodymium and neodymium in compounds?
- 06Which lanthanide commonly imparts a purple/violet tint to glass when present as ions?
- 07Which commercial ore, alongside monazite, is a major source of neodymium and praseodymium?
- 08Which element often substitutes for neodymium in NdFeB magnets to improve high-temperature performance (added in small amounts)?
- 09Which mineral is one of the principal ores for both praseodymium and neodymium?
- 10Which oxidation state is less common but can be found for praseodymium in some compounds such as PrO2?
- 11Which element is the principal active dopant in the widely used 1064 nm solid-state laser (Nd:YAG)?