Final answer:
To meet but not exceed the RDA of iodine, an adult should consume approximately 3-4 grams of iodized salt daily. Iodine anions added to table salt contain 53 protons, 74 neutrons, and 54 electrons.
Step-by-step explanation:
The Recommended Dietary Allowance (RDA) for iodine varies by age, sex, and life stage, with adults generally recommended to take in 150 micrograms (µg) per day. Iodized salt is fortified with iodine and typically contains about 45 µg of iodine per gram of salt. Therefore, to meet but not exceed the RDA of iodine, one must consume between approximately 3 to 4 grams of iodized salt per day, taking into account that dietary iodine also comes from other sources like dairy, seafood, and bread.
One iodine anion would contain 53 protons, because iodine's atomic number is 53 which defines the number of protons in an atom. As for neutrons, we can determine this number by subtracting the atomic number from the mass number (127 - 53), giving us 74 neutrons. Since we're discussing an ion with a 1- charge, it means there's one extra electron, giving us 54 electrons in total for the iodine anion.