Question

What are the names of the two groups of elements known as the rare earth elements? _________ ___and ____________

Answer 1

Answer:The thirty rare earth elements are composed of the lanthanide and actinide series. One element of the lanthanide series and most of the elements in the actinide series are called trans-uranium, which means synthetic or man-made.

Step-by-step explanation:

Answer 2

Answer:The Rare Earth Elements are: Lanthanide Series and Actinide Series.