Question

elementcompound4. select all the element(s) from the following substances.
□pf₅
□si
□co₂
□caco₃
□br₂

Explanation:

An element is a pure substance made of only one type of atom. Si (silicon) is a single - atom element. Br₂ (bromine) is a di - atomic element. PF₅, CO₂, and CaCO₃ are compounds made of different types of atoms combined chemically.

Answer:

Si, Br₂