Question

for the first element, start with the element name.
for the second element, start with the -ide name.
use prefixes to show how many atoms of each
type there are.
do not use \mono-\ on the first element.
$pcl_5$
multiple-choice question
predict the name of this...
phosphorus hexachloride
phosphorus pentachloride
monophosphorus chloride
monophosphorus pentachloride
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Explanation:

To name the compound \( PCl_5 \), we follow the rules for naming molecular compounds:

1. The first element is phosphorus (no prefix as there's 1 atom).
2. The second element is chlorine, which becomes "chloride". We use the prefix "penta - " for 5 chlorine atoms.

So the name is phosphorus pentachloride.

Answer:

B. phosphorus pentachloride