Questions asked by Oyiboka G.

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• How many electrons can fill the energy shell described by the principal quantum number #n=4# ?
  
• What is the theory of relativity?
  
• What is the smallest element in the second period?
  
• Hydrogen has two stable isotopes, and sulfur has four stable isotopes, and How many peaks would you observe in the mass spectrum of the positive ion of hydrogen sulfide (H2S)? Assume no decomposition of the ion into smaller fragments?