Practice Quiz

MTEL Chemistry Practice Exam

Category - General Chemistry

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An atom with 6 protons, 6 neutrons, and 6 electrons gains an additional electron. What is the resulting charge of the atom?
  1. 7
  2. 1
  3. +1
  4. +7
Explanation
Correct Response: B. In this atom (ion), the electrons outnumber the protons by 1, so the atom (ion) has a net charge of –1. A is incorrect since this represents the total number of electrons and does not take into consideration the presence of the 6 protons. C is incorrect since it is the electrons that outnumber the protons, rather than the protons outnumbering the electrons. D is incorrect since 6 protons are present and the charge from all of these (+6) is offset as a result of the presence of 7 electrons.
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