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Author Question: The term ________ refers to a group of elements called lanthanides and actinides that are not often ... (Read 60 times)

burton19126

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on: Jul 14, 2018
The term ________ refers to a group of elements called lanthanides and actinides that are not often found in large, commercially valuable quantities.
 
  A) special earths
  B) restricted minerals
  C) rare earths
  D) earth obscures
  E) nonelastic minerals

Question 2

Total world reserves of lithium are sufficient to last ________ years at current consumption rates.
 
  A) 12
  B) 50
  C) 200
  D) 2,500
  E) 500


b614102004

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Reply #1 on: Jul 14, 2018
Answer to Question 1

Answer: C

Answer to Question 2

Answer: E


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