CLEP Chemistry

Category - True or False

Fe3+ has a larger ionic radius than Fe2+. True or False?
  1. True
  2. False
Answer: False

The statement is false. Fe3+ has one less electron than Fe2+, but the same number of protons in the nucleus. Therefore, the remaining electrons in Fe3+ will be held more tightly to the nucleus than the electrons in Fe2+. Thus, Fe2+ has a larger ionic radius than Fe3+.
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