Practice: Periodicity

The formation of ions from atoms, by the addition or loss of a single electron, affects the size of the newly formed ion compared to the original atom.

Which statement is correct when comparing the size of a cation with the corresponding atom?

  • AThe radius of the cation is the same as the radius of the atom from which it was formed.
  • BThe radius of the cation is smaller than the radius of the atom from which it was formed.
  • CThe radius of the cation is larger than the radius of the atom from which it was formed.

Which statement is correct when comparing the size of an anion with the corresponding atom?

  • AThe radius of the anion is smaller than the radius of the atom from which it was formed.
  • BThe radius of the anion is the same as the radius of the atom from which it was formed.
  • CThe radius of the anion is larger than the radius of the atom from which it was formed.

Correct Answer

Incorrect Answer

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