The number of protons in the nucleus of an atom
The mass number of an element is the total number of protons plus neutrons
The atomic number is the number of protons (which is the same as the number of electrons) of an element
there are 9 digits in the SSN The digits in the Social Security number allow for the orderly assignment of numbers. The number is divided into three parts: the area, group and serial numbers. The...
130 - 1, 2, 5, 10, 13, 26, 65, 130therefore 8 factors