Step 1 : Introduction to the question "3. Which element, other than fluorine, can help to prevent caries? You can find this element in eggs and in green beans."
...1. Arsenic 2. Molybdenum 3. Lead 4. Oxygen Molybdenum is a whitish metal with a very high melting point. It has the atomic number 42. Molybdenum is present in tooth enamel. Sources indicate that it may contribute to preventing caries and tooth decay. A region with low molybdenum concentrations in the soil could typically present a higher occurrence of oesophageal cancer. Sources of molybdenum include eggs, liver, green beans, sunflower seeds, lentils and cucumbers. Overexposure to molybdenum is toxic. Inhalation of molybdenum fumes can harm one's health more readily than overconsumption of foods containing molybdenum. Arsenic and lead are highly toxic. Don't use products containing arsenic or lead to brush your teeth. Oxygen is very reactive. Oxidation is one of the best documented forms of decay of solid structures.
