Question

name: date: period: counting atoms task cards directions: using the chemical formula cards, count the number of atoms for each element in the formula. then calculate the total number of atoms in each formula. 16 o₂

Explanation:

Step1: Identify element and subscript

The formula is $\text{O}_2$, where $\text{O}$ is oxygen, and the subscript 2 indicates the number of oxygen atoms.

Step2: Calculate total atoms

There is only one element, so sum the atoms: $2$

Answer:

• Number of oxygen atoms: 2
• Total number of atoms: 2