Question

tetraphosphorus triselenide express your answer as a chemical formula. a chemical reaction does not occur for this question.

Explanation:

Step1: Identify prefixes

"tetra-" means 4, "tri-" means 3. The first element is phosphorus (P), second is selenium (Se, selenide is anion of Se).

Step2: Form formula

Use the prefixes to determine subscripts. Phosphorus has subscript 4, selenium has subscript 3. So formula is $P_4Se_3$.

Answer:

$P_4Se_3$