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chapter 4

atomic structure

TermDefinition
nucleus is a dense , positively charged mass located in the center of the atom
proton is a positively charged subatomic particle that is found in the nucleus of an atom
electron is a negatively charged subatomic particle that is found in the space outside the nucleus
neutron is a neutral subatomic particle that is found in the nucleus of an atom
atomic number a unique number for each element that equals the number of protons in an atom of that element
mass number the sum of the number of protons and neutrons in the nucleus of an atom
energy levels the possible energies that electrons in an atom can have
electron cloud is a visual model of the most likely locations for electrons in an atom
orbital is a region of space around the nucleus where an electron is likely to be found
electron configuration is the arrangement of electrons in the orbitals of an atom
ground state a state in which all the electrons in an atom have the lowest possible energies
Created by: madison.haywood
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