131
53 + 25 = 78
the solution to the equation -53 plus 1 -26 is -78.
53
78 multiplied by 53 is 4,134.
78+78-:(85)/(78)+7,879=1405
78 + 89 + 167 + 897 + 78 = 1309
55 + 82 + 92 + 78 + 100 + 96 + 78 = 581
B. 53 neutrons. The number of neutrons in an atom is calculated by subtracting the number of protons from the atomic mass of the isotope. Since Iodine-131 has an atomic mass of approximately 131, and it has 53 protons, the number of neutrons is 131 - 53 = 78.
Iodine is element number 53 and and so has 53 protons. There are thus 131-53 = 78 neutrons
78 + 78 = 156
78/1.06 = 7800/106 = 3900/53
78