Question

some early philosophers cónidered elements to be earth, wind, water and fire. Why do chemists today no longer classìy water as an element
Chemists do not classify water as an element because it is composed of two different types of atoms, hydrogen and oxygen. An element is a pure substance consisting of only one type of atom. Therefore, water is a compound, not an element. Chemists classify elements based on the number of protons in their atomic nuclei, which determines their unique chemical and physical properties.

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