Phosphorus trichloride is used in the production of chemicals that keep plants from growing in a specific area. This compound is made of phosphorus and chlorine atoms.What two symbols would make up the chemical formula of this covalent compound?

Chemical formulas use the element symbols for the atoms in a compound. Phosphorus has the symbol P, and chlorine has the symbol Cl, so phosphorus trichloride contains P and Cl. The correct choice is P and Cl; C is the symbol for carbon, not chlorine.

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