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Physical Science Vocabulary

Any negatively charged atom or group of atoms.
1/12 of the mass of Carbon-12 atom in its ground state and used to express masses of atomic particles
An elementary Particle having no charge and a greater mass than a proton.
A negatively charged particle existing independently or as the component outside the nucleus of the atom.
A positively charged elementary particle that is a fundamental part of all atomic nuclei
The number of positive charges, or protons, in the nucleus of an atom of a given element, and therefore also the number of electrons normally surrounding the nucleus
The positively charged mas within an atom, consisting of neutrons and protons.
The integer nearest in value to the atomic weight of an atom
A scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.
A quantum of electromagnetic radiation, usually considered an elementary particle with zero rest mass and charge
An electron of an atom, located in the outermost shell of the atom, that can be transferred to or shared with another atom.
Any of two or more forms of a chemical element, having the same atomic number, but different atomic weights.
Any positively charged atom or group of atoms.
A mathematical expression called wave function that describes properties of no more than two electrons in the vicinity of the nucleus or nuclei in a molecule.