are there any isotopes for which the mass number is not well-defined? how does the mass number relate to the concept of isobaric analog states?

Dec 20, 2020 ... How many neutrons are there in atoms of oxygen-18? We know that the mass number is equal to the number of protons plus the number of neutrons. ... mass number - isotopes - atomic mass unit - Bohr / Rutherford atomic model. ... equal measure to the formulation of the final grade. At the end, the ... Atomic number is equivalent to the number of neutrons while the mass number is equivalent to the sum of the number of protons and number of electrons. The atomic mass now known to be the sum of the protons and neutrons in the nucleus. Mass Number. Rutherford showed that the vast majority of the mass of an atom ... By the way, the mass of an element is not equal to the sum of the masses of ... As long as the number of atoms remains the same the relative mass does not change. The number of neutrons in the nucleus is equal to A minus Z. chemical symbol. Two different forms, or isotopes, of carbon are shown below: Carbon-12: with 6 ... 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. There is an equal number of electrons surrounding the nucleus to keep ... mass number, "A", varies. Take hydrogen, for example. It has three naturally ... ... Number equal to 2? Click the red submit button once you think you have it correct., Can you create an atom with Mass Number of 3 and a neutral charge? Click ... ... mass and density scales that lead to “naturalness” in the Universe. Namely ... number and atomic mass number, respectively, of the element(s) composing ...