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Chem Vocab

Structure of The Atom Vocab

TermDefinition
Atom The smallest identifiable unit of an element.
Matter Anything that occupies space or has mass.
Proton A positively charged nuclear particle
Neutron A nuclear particle with no electrical charge and nearly the same mass as a proton.
Electron A nuclear particle with no electrical charge and nearly the same mass as a proton.
Nucleus The small core containing most of the atom’s mass and all of its positive charge.
Atomic Mass Unit (AMU) The unit commonly used to express the masses of protons, neutrons, and nuclei.
Atomic Number (Z) The number of protons in the nucleus of an atom.
Mass Number (A) The sum of the number of neutrons and protons in the atom.
Average Atomic Mass (or atomic mass) A weighted average of the masses of each naturally occurring isotope of an element; atomic mass of atoms of an element.
Created by: SneakyAvacado16
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