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Atomic STructure

TermDefinition
proton positive subatomic particle; mass 1= amu; location nucleus
neutron neutral subatomic particle; mass = 1 amu; location nucleus
electron negative subatomic particle; mass = 0 amu; location in the cloud
Atomic Number identifies element; number of protons in nucleus
Mass Number mass of nucleus of an isotope; always a whole number; protons + neutrons
Atomic Mass weighted average of naturally occurring isotopes; decimal value on periodic table
isotopes atoms of the same element with different numbers of neutrons
ions charged atoms - too many or too few electrons
anion a negative ion; extra electrons
cation a positive ion; too few electrons
ground state electrons in lowest energy state possible; on periodic table
excited state electron that has absorbed energy and jumped to higher level
bright line spectrum colored lines produced when excited state electrons emit energy as light to fall back to ground stated
gold foil experiment proof that atoms are mostly empty space with a dense positive nucleus
electron configuration how/ where electrons are likely to be found around a nucleus
wave mechanical model electrons are in a cloud around nucleus with different amounts of energy
Bohr model electrons orbit nucleus in specific paths
orbital region of space where an electron might be found
Created by: mrsflower