Acids donate protons in chemical reaction. Remember that chemical reactions do not involve the atomic nucleus. When the electron is removed from hydrogen, making a hydrogen ion, the particle that remains is a proton.
Acids taste sour.
The sour taste of citrus fruits is caused by citric acid. Whether an acid is strong or weak depends on the amount of hydrogen ionized. Binary acids - Composed of two elements, hydrogen and a nonmetal. Named with the prefix hydro , the name of the nonmetal, and the suffix ic . Composed of three elements, hydrogen, a nonmetal, and oxygen.