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Author Question: All of geologic time prior to the beginning of the Paleozoic era is commonly referred to as the ... (Read 232 times)

Yi-Chen

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on: Jul 14, 2018
All of geologic time prior to the beginning of the Paleozoic era is commonly referred to as the ________.
 
  A) Precambrian
  B) Cambrian
  C) Paleogene
  D) Jurassic

Question 2

During alpha emission, the mass number is reduced by ________ and the atomic number is decreased by ________.
 
  A) 2; 4
  B) 4; 2
  C) 3; 6
  D) 6; 4


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l.stuut

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

Answer: A

Answer to Question 2

Answer: B


Yi-Chen

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Reply 2 on: Jul 14, 2018
Excellent

kjohnson

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Reply 3 on: Yesterday
Gracias!

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