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The Nature of Matter
2.1
10
Biology
9th Grade
11/17/2013

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Term
Molecule
Definition
Smallest unit of all compounds
Term
Isotope
Definition
One of several forms of an element, contains same number of protons but different number of neutrons
Term
Covalent Bond
Definition
Sharing electrons
electrons move around nuclei
atoms of the same element= molecule
Term
Atom
Definition
Basic Unit of matter
Term
Element
Definition
Pure substance, one type of atom
Term
Ion
Definition
Atom that gains/loses and electron
Term
Electron
Definition
Not much mass
Orbit Nucleus
Negative charge
Term
Compound
Definition
Substance formed by 2+ elements
Term
Ionic Bond
Definition
one or more electrons transferred from one atom to another
Term
Nucleus
Definition
Center of an atom
Contains protons and electrons
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