Question

1. Based on their positions on the Periodic Table, which ONE of the following elements would be expected to have the largest first ionization energy? A) Si B) K C) O D) As E) Ca

2. Based on their positions on the Periodic Table, rank these ions in order of decreasing ionic radius: F–, Mg2+, Na+, O2–, S2–. (The correct answer has largest ion first, smallest ion last.)

A) S2– > O2– > F– > Na+ > Mg2+ B) O2– > F– > Na+ > Mg2+ > S2– C) O2– > S2– > F– > Na+ > Mg2+ D) Mg2+ > Na+ > F– > O2– > S2–

E) Mg2+ > S2– > Na+ > F– > O2–