Final answer:
Pink salt does not usually contain iodine unless specifically added, unlike iodized salt, which has iodine added to prevent deficiencies. To calculate the number of protons, neutrons, and electrons in an iodide anion (with mass number 127 and a 1- charge), it has 53 protons, 74 neutrons, and 54 electrons. Seaweed naturally contains iodide ion, a historical source of dietary iodine.
Step-by-step explanation:
The question is about whether pink salt contains iodine. Pink salt often does not contain iodine unless it has been specifically added. Usually, iodized salt is ordinary table salt with iodine added, an essential micronutrient that helps prevent thyroid health issues such as iodine deficiency. The iodine in iodized salt typically appears in the form of iodide anions, which have a 1- charge and a mass number of 127.
To determine the number of protons, neutrons, and electrons in an iodide anion, we can use the information provided. Iodine's atomic number is 53, which means it has 53 protons. The mass number of iodine is 127, which indicates the total number of protons plus neutrons. Therefore, to find the number of neutrons, we subtract the number of protons from the mass number: 127 – 53 = 74 neutrons. Since the iodide anion has a 1- electric charge, it has one extra electron, giving it a total of 54 electrons.
One historical method of increasing dietary iodine was through the consumption of seaweed, such as kelp, which naturally contains large amounts of iodide ion. In addition, the commercial preparation of iodine involves chemical reactions like the reduction of sodium iodate with sodium hydrogen sulfite.