On the chemical formula of potassium fluoride
If you want to know the chemical formula of potassium fluoride, you need to understand the chemical reason. Potassium, a metal element, is also active, and often loses an electron in chemical reactions, forming a positively charged cation, which is denoted as $K ^ + $. Fluoride, a non-metallic element, is particularly active, often obtaining an electron, forming a negatively charged anion, denoted as $F ^ - $.

When potassium and fluoride combine, according to the principle of charge balance, anions and cations attract each other to achieve electrical neutrality. A potassium ion combines with a fluoride ion to form an electrically neutral compound. Therefore, the chemical formula of potassium fluoride is $KF $. This formula is concise and clear, showing not only the composition of potassium and fluorine, but also the law of chemical combination. If scholars understand this principle, the method can be obtained from the derivation of the chemical formula of chemical substances.