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Author Question: Atoms are held together by A) the electrostatic force of attraction between the protons in the ... (Read 26 times)

eruditmonkey@yahoo.com

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on: Jul 27, 2018
Atoms are held together by
 
  A) the electrostatic force of attraction between the protons in the nucleus and the surrounding electrons
  B) the combined electrostatic force of attraction between the protons and neutrons in the nucleus and the surrounding electrons
  C) the force of gravitational attraction between the protons in the nucleus and the surrounding electrons
  D) the electrostatic force of attraction between the neutrons in the nucleus and the surrounding electrons

Question 2

Carbon isotope evidence from rocks found on an island off the coast of Greenland, although controversial, suggests that life may have
 
  A) existed and was well established by3.4 to 3.5 billion years ago
  B) originated about 3.4 billion years ago
  C) existed 3.85 billion years ago
  D) originated when the Earth formed 4.6 billion years ago


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akemokai

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

C


eruditmonkey@yahoo.com

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Reply 2 on: Jul 27, 2018
Excellent

cassie_ragen

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Reply 3 on: Yesterday
Gracias!

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