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Madyson 3-1

Matter and Atomic Structure 3-1

the smallest particle of an element that has all of the characterisitics of that element Atom
the combined number of protons and neutrons in an atom's nucleus Atomic Mass
the number of protons in an atom's nucleus Atomic Number
has little mass but it has a negative electric charge that is the same magnitude as the postive charge of a proton Electron
a substance that can not be broken down into simpiler substances by physical or chemical means Element
represents the area in an atom where an electron is most likely to be found Energy Level
when atoms of the same element have different mass numbers Isotope
the number of protons and neutrons Mass Number
a particle with about the same mass as a proton but electrically neutral Neutron
made of protons and neutrons Nucleus
a tiny particle that has mass and a postive electric charge Proton
the spontaneus process through which unstable nuclei emit radiation Radioactivity
the outermost electrons Valence electron
Created by: hpeine