Question

how many elements are in the chemical formula h₂o? 2 4 1 3

Explanation:

An element is a pure substance that cannot be broken down further chemically. In the formula $\text{H}_2\text{O}$, the unique capitalized symbols represent distinct elements: $\text{H}$ (Hydrogen) and $\text{O}$ (Oxygen). The subscript numbers only indicate the count of atoms of each element, not new elements.

Answer:

2