Description : To reduce tooth decay most toothpastes contain a – (1) Bromide (2) Fluoride (3) Iodide (4) Chloride
Last Answer : (2) Fluoride Explanation: Fluoride in toothpastes prevent tooth, decay from progressing and can even reverse, or stop, early tooth decay. It works by promoting a chemical reaction in tooth enamel ... itself into enamel weakened by acid attack, making the tooth more resistant to future acid attacks.