What are rare earths and transuranic elements
Answers
Answer:
The 14 elements from cerium (Z = 58) to Lutensium are called rare earth elements because their abundance in the earth crust is very less. The properties of all these 14 elements are similar to lanthanum. So they are called lanthanides or lanthanous or lanthanoids.
Answer:
The rare-earth elements, also called the rare-earth metals or (in context) rare-earth oxides, or the lanthanides (though yttrium and scandium are usually included as rare-earths) are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals.[1] Scandium and yttrium are considered rare-earth elements because they tend to occur in the same ore deposits as the lanthanides and exhibit similar chemical properties, but have different electronic and magnetic properties.
The transuranium elements (also known as transuranic elements) are the chemical elements with atomic numbers greater than 92, which is the atomic number of uranium. All of these elements are unstable and decay radioactively into other elements
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