jueves, 17 de marzo de 2011

Elements and Atoms

Elements and Atoms

Element:A substance that cannot be broken down any further into anything simpler.


Atom:The smallest particle that has the same chemical properties as the element.



Nucleus:An atom´s  dense center, where most of its mass.

Electron:A negatively charged particle that moves around an atom´s Nucleus.

Proton:A positively charged particle inside an atom´s Nucleus

Neutron:A particle with no charge inside an atom´s nucleus.



Atomic Number: The number of protons in an atom.

Metal:Any group of elements that conduct heat and electricity, is shiny and bendable.


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