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Atoms
Common definitions for chemistry terms concerning Atoms
12
Chemistry
8th Grade
02/12/2007

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Term
Atomic Nucleus
Definition
The central core of the atom. [image][image]
Term
Proton
Definition
A positively charged subatomic particle found inside the nucleua of an atom.[image]
Term
Electron
Definition
The fundamental component of all atoms. Negatively charged.[image]
Term
Atomic Mass
Definition
The total mass of an atom.[image]
Term
Mass Number
Definition
The total number of protons and neutrons in an atom's nuleus.[image]
Term
Isotopes
Definition
Atoms of the same element that contain different numbers of neutrons.[image]
Term
Nuclear Fission
Definition
The splitting of a nucleus into fragments.[image]
Term
Transmutation
Definition
The changing of one element to another.[image]
Term
Alpha Particle
Definition
Combination of two protons and two nuetrons.[image]
Term
Beta Particle
Definition
An electron ejected from a nucleus.[image]
Term
Electron Configuration
Definition
The arrangements of electrons in the orbitals of an atom.[image]
Term
Citations:
Definition
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www.lbl.gov/abc/wallchart/chapters/01/1.html
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