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Atoms
Fm
10
Science
8th Grade
01/06/2012

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Term
Proton
Definition
Positively charged particle in the nucleus of an atom.
Term
Neutron
Definition
A particle having no charge.
Term
Electron
Definition
A negatively charged particle that exists in an electron cloud outside of the atoms nucleus.
Term
Atom
Definition
The smallest component of an element. It has a nucleus and holds protons,neutrons, and electrons.
Term
Molecule
Definition
A neutral particle formed when atos share electrons
Term
Atomic number
Definition
Number of protons in the nucleus of an atom of a given element.
Term
Electron cloud
Definition
Region surrounding the nucleus of an atom, where electrons are most likely to be found.
Term
Element
Definition
Substance that cannot be broken down into simpler substances.
Term
Nucleus
Definition
The central part of a atom where protons and neutrons are grouped.
Term
Atomic mass
Definition
The measure of the mass of an element.
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