On the chemical formula of aluminum fluoride
To find the correct chemical formula of aluminum fluoride, it is necessary to clarify its elemental composition and chemical combination. For aluminum, the chemical symbol is Al, which often shows + 3 valence in compounds. For fluorine, the symbol is F, which is active and mostly shows -1 valence in compounds. The chemical formula of

compounds must obey the principle of charge balance, that is, the algebraic sum of positive and negative valence must be zero. In order to achieve charge balance, an aluminum ion (Al ³) needs to be combined with a trifluoride ion (F), so the sum of the total positive valence (+ 3) and the total negative valence (-1 × 3) is zero.

Therefore, the correct chemical formula for aluminum fluoride is AlF. This formula accurately shows the proportional relationship between aluminum and fluoride, which is of vital significance in many fields such as chemical research and industrial production. It is the basis for clarifying material properties and reaction mechanisms.