Elements and Atoms

element:a substance that cannot be broken down any further into anythyng 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 of a group of elements that conduct heat and electricity, is shiny and bendable.