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General Terms
Atomic Mass (AKA Average Atomic Mass or Atomic Weight): weighted average of the masses of isotopes of an element.
Atomic Number: the number of protons in the nucleus of an atom; this is the same number for electrons in a neutral atom.
Crystal Structure: the arrangement of atoms when the element is in its solid state
Electron: negatively charged subatomic particle of an atom; located in the electron cloud, an area outside the atom’s nucleus
Isotope: a variation of an element atom due to a slight difference in the number of neutrons. The isotopes are averaged (depending on how often they occur in nature) to find the average atomic mass of an element.
Natural Abundance: how often the isotope occurs in nature
Neutron: neutrally charged subatomic particle of a atom; located in the atom’s nucleus
Proton: neutrally charged subatomic
particle of a atom; located in the atom’s nucleus