Question

what is lanthanum and neodymium?​

Answer 1

Answer:

• Lanthanum is a chemical element with the symbol La and atomic number 57. It is a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air
• Neodymium is a chemical element with the symbol Nd and atomic number 60. Neodymium belongs to the lanthanide series and is a rare-earth element.

Answer 2

Lanthanum is a ductile and malleable silvery white metal that is soft enough to be cut with a knife. It is the second most reactive of the rare-earth metals after europium. Lanthanum oxidizes in air at room temperature to form La2O3. ... Lanthanum occurs in the rare-earth minerals monazite and bastnasite.

Neodymium is a ductile and malleable silvery white metal. It oxidizes readily in air to form an oxide, Nd2O3, which easily spalls, exposing the metal to further oxidation. ... Of the rare earths, only yttrium, lanthanum, and cerium are more plentiful than neodymium.

Oxidation states: +2 (rare, unstable), +3

Boiling point: 3,074 °C (5,565 °F)

Electron configuration: 4f46s2

Atomic number: 60

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