The element GreatRiverdom (Gr) is represented by the following symbol. How many neutrons does an atom of radium have?

226/88 Gr

226

138

88

314

The question asks for the number of neutrons in an atom of radium, not GreatRiverdom (Gr). The information given about GreatRiverdom is irrelevant to the question. Therefore, the answer cannot be determined from the information given.