Gryphon is the 16,347 th most popular name of all time. How many people with the first name Gryphon have been born in the United States? From 1880 to 2016, the Social Security Administration has recorded 485 babies born with the first name Gryphon in the United States.
Making the world better, one answer at a time. 25 is the number of protons and neutrons added together. The atomic number of Mg is 12 which is the number of protons. So 25 - 12 = 13 neutrons.
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.