martes, 28 de septiembre de 2010

What Matter is made of

What Matter is Made of


Element: a basic building block of matter ; a pure substance that cannot be broken down into anything simpler.


Compound: a chemical combination of 2 or more elements into a single substance.

Atom: the smallest unit of an element that still has the properties of the element.







Proton: a particle with a positive charge in the nucleus of an atom.




Neutron: an uncharged particle in the nucleus of an atom.


Electron: a particle with a negative charge moving around the nucleus of an atom.


Nucleus: the dense center part of an atom.

Molecule: a group of more than one atom joined together that acts like a single participle.


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