what are the applications of isotopes with specific mass numbers in research? how is the mass number used in medical imaging techniques like PET scans?

May 11, 2020 ... The mass number is equal to the sum of the number of protons, neutrons, and electrons. The sum of the number of the electrons and protons. Mar 26, 2025 ... Mass number is always equal to the sum of the number of protons and the number of neutrons. Electrons: Protons: (An observant student might notice that the sum of an atom's subatomic particles does not equal the atom's actual mass: The total mass of six protons, six ... atomic number=14Si28 = mass number. The mass number is 28, which tells us that silicon has a total number of protons and neutrons that equals 28. As we ... Physics. the integer nearest in value to the atomic weight of an atom and equal to the number of nucleons in the nucleus of ... 2) Mass Concentration. The mass concentration of a solution is equal to the mass ... The number of moles we started with is equal to the number of moles of ... The mass number is equal to the number of protons plus neutrons. In a neutral atom, the number of protons equals the number of electrons. The charge on an ion ... May 24, 2020 ... ... of an atom. Mass number or atomic mass is equal to the total number of protons and neutrons present in the nucleus. For example, the mass number ... ... mass number is being discussed. Occupational (using the NRC's definition of ... Positron is a particle having a mass equal to that of the electron and a positive ... Having numbers of chromosomes not equal to exact multiples of the haploid number ... mass number; chemical properties of isotopes of a particular element are ...