vocabulary 2

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


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

Nucleus: an atom's dense center, where most of its mass is.


Electron: a negatively charged particle that moves around an atom's nucleus.

Proton: a positively charged perticle inside an atom´s nucleus.

Neutron: a perticle with no charge inside an atom´s nucleus.

Atomic number: the number of protons is an atom.

Metal: any of a group pf elements that conduct heat and electricity, is shiny and bandale.