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2.1 The Nature of Matter
2.1 The Nature of Matter bioterms
6
Biology
9th Grade
10/24/2014

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Term

An atom is the basic unit of matter.

 

 

A nucleus is the center of an atom, which contains the protons and neutrons in cells, structure that contains the cell's genetic material in the form of DNA.

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An electron is the negatively charged particle located in the space surrounding the nucleus.

 

 

 

 

 

An element is a pure substance that consists entirely of one type of atom.

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An isotope is one of several forms of a single element, which contains the same number of protons but different numbers of neutrons.

 

 

 

 

A compound is a substance formed by the chemical combination of two or more elements in definite proportions.

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An ionic bond is the chemical bond formed when one or more electrons are transferred from one atom to another.
Definition
An ion is an atom that has a positive or negative charge.
Term

A covalent bond is a type of bond between atoms in which the electrons are shared.

 

 

 

 

 

A molecule is the smallest unit of most compounds that displays all the properties of that compound.

Definition
Term
The van der Waals force is the slight attraction that develops between oppositely charged regions of nearby molecules.
Definition
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