Atom:the smallest particlee of an element that has the same chemical properties as the element.
Nucleus:an atom"s dense center, where most it mass is.
Electron:a negatively charge particle that move araund an atoms nucleus.
![](http://estudiarfisica.files.wordpress.com/2008/10/electron.jpg)
Proton:a posotively charge particle inside an atom nucleus.
![](http://www.jambitz.com/wp-content/uploads/2009/11/525px-Quark_structure_proton.svg1.png)
Neutron:a particle with no charge inside an atom nucleous.´
![](http://www.madrimasd.org/blogs/ciencianuclear/wp-content/blogs.dir/89/files/486/o_neutron.jpg)
Atomic: Number:the nbunber of protons in an atom.´
![](http://www.linnaeus.uu.se/online/phy/microcosmos/gifs/ptable.gif)
Metal:any of a grup of element that conduct head an electricity is shiny an bendable.
![](http://berryberryeasy.com/wp-content/uploads/2011/03/Group-1-atom-arrangement.jpg)