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Question 117

A monatomic ion has a two-plus charge. Which particle-count relationship must it have?

  1. Equal numbers of protons and electrons
  2. Two fewer protons than electrons
  3. Two fewer electrons than protonsCorrect answer
  4. Two fewer neutrons than protons

Explanation

A two-plus charge means positive charge exceeds negative charge by two units, so the ion has two fewer electrons than protons. Giving it two extra electrons would instead produce a two-minus charge.

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Question 117: A monatomic ion has a two-plus charge. Which particle-count… · The Periodic Table and Elements · Questena