Elements and Atoms

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 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.