Currently, the atomic mass unit (amu) is based on being exactly one-twelfth the mass of a carbon-12 atom and is equal to 1.66 * 10^-27 kg.  If the amu were based on sodium-23 with a mass equal to exactly 1/23 of the mass of a sodium-23 atom, would the mass of the amu be different? If the new mass of the amu based on sodium-23 is 1.67*10^-27 kg. How would the mass of a hydrogen atom, in amu, compare with the current mass of a hydrogen atom in amu?

Introductory Chemistry: An Active Learning Approach
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Chapter5: Atomic Theory : The Nuclear Model Of The Atom
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Currently, the atomic mass unit (amu) is based on being exactly one-twelfth the mass of a carbon-12 atom and is equal to 1.66 * 10^-27 kg. 

  • If the amu were based on sodium-23 with a mass equal to exactly 1/23 of the mass of a sodium-23 atom, would the mass of the amu be different?
  • If the new mass of the amu based on sodium-23 is 1.67*10^-27 kg. How would the mass of a hydrogen atom, in amu, compare with the current mass of a hydrogen atom in amu?
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