Question

which of the following lewis dot structures for iodine is correct?

Explanation:

Step1: Determine the valence electrons of iodine

Iodine is in Group 17 (or VIIA) of the periodic table. Elements in this group have 7 valence electrons.

Step2: Analyze each Lewis dot structure

• Structure A: Has more than 7 valence electrons represented (incorrect).
• Structure B: Correctly represents 7 valence electrons. One single electron (for bonding in many cases) and three pairs of electrons.
• Structure C: Has fewer than 7 valence electrons represented (incorrect).
• Structure D: Has fewer than 7 valence electrons represented (incorrect).

Answer:

B.