A compound is a substance that is formed when two or more different chemical elements bond together in a fixed ratio, like water (H₂O) from hydrogen and oxygen or salt (NaCl) from sodium and chlorine.
In chemistry, the chemical nomenclature of ionic and molecular compounds uses a systematic approach of prefixes to indicate the number of each element present in the compound. This chemical naming of ...
The molecular formula and empirical formula of some substances are the same. For example, both types of formula for carbon dioxide are CO 2.
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