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CLEP Chemistry Practice Test

Category - Chemistry

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Cobalt has an atomic mass of 59 and an atomic number of 27. What does this information reveal about most cobalt atoms?
  1. They contain more neutrons than protons.
  2. They naturally have a net negative charge.
  3. They attract protons more strongly than electrons.
  4. They form ions with a charge of 127 in compounds.
Explanation
Answer: A - They contain more neutrons than protons.
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