Chem Pro-Elec-Neu-tron vocab
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10 Terms
Atomic Mass
the mass of a single atom
Atomic Mass Unit
(AMU)
A unit that measures the mass of Atoms. One AMU = the mass of a Proton or neutron
Average Atomic Mass
The Average mass of all the isotopes of an element, shown on the periodic table
Electron
A tiny particle with a
negative Charge that orbits the Atoms Center
Ion
An atom that has a positive or negative Charge because it has gained or lost electrons
Isotope
Atoms of the same element with a different number of neutrons
Neutral Atom
an atom with no overall electric Charge, since it has an equal number of protons and electrons
Neutron
A Particle in the center of an atom with no charge
Mass number
the total Count of protons and neutrons in an atom
Proton
a Particle in the Center of an atom With a positive charge
Note 
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