* Element Symbols: Each element is represented by a one or two-letter symbol. These symbols are derived from the element's Latin or English name, e.g., H for hydrogen, O for oxygen, Na for sodium, Cl for chlorine, etc.
* Subscripts: The number of atoms of each element in the compound is indicated by a subscript written to the right of the element symbol. If no subscript is written, it means there is only one atom of that element. For example, H₂O represents a water molecule with two hydrogen atoms and one oxygen atom.
* Parentheses: Parentheses are used to indicate a group of atoms that act as a unit, especially when there are multiple instances of the group in the compound. For example, Ca(OH)₂ represents calcium hydroxide, which has one calcium atom, two hydroxide (OH) groups.
Here are some examples:
* NaCl: Sodium chloride (table salt)
* H₂SO₄: Sulfuric acid
* C₆H₁₂O₆: Glucose (a simple sugar)
* CO₂: Carbon dioxide
In addition to the chemical formula, compounds can also be represented by structural formulas which show the arrangement of atoms and bonds within the molecule. This provides more information about the structure of the compound.
