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Chapter three

Atom basic unit of mass
Plum-Pudding Model atom diagram only consisting of electrons
Gold-Foil Experiment otherly known as the Alpha scatter Experiment...came to conclusions that atom is mostly empty space and theres a small positive nucleus core
Orbitals clouded area where electrons are located
Nucleus small positive core of an atom
Electron negative charged particles of an atom
Neutron The neutrally charged particles of an atom
Mass Number Total of protons and neutrons
Atomic number number of protons and electrons
Ion non-neutral gained or lost electrons
Isotope different types of atoms
Atomic Mass weighted average of the naturally occuring isotopes
Valence electrons electrons in outermost shell
Octet 8-to have 8 electons per cloud
Excited State When electrons jump to a higher energy level
Ionization Energy amount of energy needed to remove an electron
Electron Affinity energy change when an electron is added to the neutral species to form a negative ion
Electronegativity describes an atoms ability to attract electrons(sexiness)
Created by: brydecker