Question

1. students were given a chart containing different chemical symbols and formulas to review. select the three examples of chemical symbols that are located in this chart.

Explanation:

A chemical symbol represents a single element, while a chemical formula represents a compound (multiple elements). \( \text{H}_2\text{O} \) and \( \text{CO}_2 \) are formulas (compounds), but \( \text{O} \) (oxygen), \( \text{N} \) (nitrogen), and \( \text{Na} \) (sodium) are symbols for individual elements.

Answer:

• \( \text{O} \)
• \( \text{N} \)
• \( \text{Na} \)