The #pragma directive cannot be used in a macro definition because the compiler interprets the number sign character ('#') in the directive to be the stringizing operator (#). The following code example demonstrates how the __pragma keyword can be used in a macro.
The mass number for iodine is 131, which is the sum of the protons  and neutrons. Iodine has 53 protons and 53 electrons, if neutral.  To find how many neutrons iodine has s â¦ ubtract 53, the number of  protons from the mass number of 131. This shows that iodine has 78  neutrons.
growth and metabolic function. Its chemical symbol is I and its atomic number of 53 on the Periodic Table of Elements. Elemental iodine is two iodine atoms bonded together. Iodide is the ion state of iodine, occurring when iodine bonds with another element, such as potassium. In this form,iodine can be ingested or applied topically (such as with povidone iodine, an iodide). So iodine and iodide are simply different expressions of the same element.