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Madyson 3-1
Matter and Atomic Structure 3-1
Question | Answer |
---|---|
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 |