Question

question 10 (1 point) listen elementcompound3. select all the compound(s) from the following substances. si pf₅ br₂ caco₃ co₂

Explanation:

Step1: Recall element and compound definitions

An element is a pure - substance made of only one type of atom. A compound is a pure - substance made of two or more different types of atoms chemically combined.

Step2: Analyze Si

Si (silicon) is an element as it consists of only silicon atoms.

Step3: Analyze PF₅

PF₅ (phosphorus pentafluoride) is a compound as it is made of phosphorus and fluorine atoms chemically bonded.

Step4: Analyze Br₂

Br₂ (bromine) is an element as it consists of only bromine atoms.

Step5: Analyze CaCO₃

CaCO₃ (calcium carbonate) is a compound made of calcium, carbon, and oxygen atoms chemically combined.

Step6: Analyze CO₂

CO₂ (carbon dioxide) is a compound made of carbon and oxygen atoms chemically bonded.

Answer:

B. PF₅, D. CaCO₃, E. CO₂