# How many valence electrons are in ICl_5?

$\text{There are 42 valence electrons.}$
Both iodine, and chlorine are halogens, and therefore each such atom has 7 electrons. In the Lewis structure, therefore, we have to distribute $6 \times 7$ valence electrons, and therefore 21 valence electron pairs. The central iodine atom has a single lone pair, and each chlorine atom bears 3 lone pairs.