the number of protons and neutrons may be different
{"Image DocumentName": "The number of protons and neutrons may be different.", "Image ImageDescription": "Mass Number is the total number (the sum) of the protons and neutrons in the nucleus of an atom. The number of protons and neutrons may be different. To find the mass number, round the average atomic mass to get an approximate mass number. Subtract the number of protons (atomic number) from the mass number to get the number of neutrons. Use your periodic table to complete the following chart. Element name. Symbol. Atomic # Atomic mass. Mass # # of protons. # of neutrons. # of electrons. Calcium B Chlorine. Cl.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}