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 number of protons in the nucleus is equal to atomic number, Z while the number of neutrons in the nucleus is sometimes called neutron number, N. Mass number gives the approximate atomic mass of the element. For example, mass number of magnesium is 24 as it contains 12 protons and 12 neutrons in its nucleus.