Question

how many atoms are in the chemical formula co₂?
2
1
3
4

Explanation:

Step1: Identify element - carbon

The chemical formula $CO_2$ has 1 carbon (C) atom.

Step2: Identify element - oxygen

It has 2 oxygen (O) atoms as indicated by the sub - script 2.

Step3: Calculate total atoms

Add the number of carbon and oxygen atoms: $1 + 2=3$.

Answer:

3