Answer:
Br.
neutron = mass number - atomic number
youcan see the answer at the pic
Explanation:
See this l know natural only
1.
meteorology A line drawn on a map or chart connecting places of equal or constant pressure.
2.
nuclear physics Either of two nuclides of different elements having the same mass number.
3.
thermodynamics A set of points or conditions at constant pressure.
i believe its d
