Question

which chemical formula shows a covalent compound?
mgo
co₂
libr
nacl

Explanation:

Step1: Recall the nature of ionic and covalent compounds

Ionic compounds are formed between metals and non - metals (transfer of electrons). Covalent compounds are formed between non - metals (sharing of electrons).

Step2: Analyze each option

• MgO: Magnesium (Mg) is a metal, oxygen (O) is a non - metal. It is an ionic compound.
• CO₂: Carbon (C) and oxygen (O) are non - metals. They share electrons to form covalent bonds.
• LiBr: Lithium (Li) is a metal, bromine (Br) is a non - metal. It is an ionic compound.
• NaCl: Sodium (Na) is a metal, chlorine (Cl) is a non - metal. It is an ionic compound.

Answer:

CO₂