Atomic Mass The nucleus of an atom is made up of protons and neutrons, and makes up most of the mass.
{"Image DocumentName": "Atomic Mass The nucleus of an atom is made up of protons and neutrons, and makes up most of the mass.", "Image ImageDescription": "The unit of measurement for atomic particles is atomic mass units (amu). The mass of an individual proton or neutron is close to 1 amu. A carbon atom has 6 protons and 6 neutrons, so its atomic mass is 12.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}