Vocabulary # 2

1 element: a substance that connot be broken down any further into anything simpler



2 atom: the smallest psrticle of an element that has the same chemical propertoies as the element



3 nucleus: an atom's  dense center, ahere most of its mass is



4 electron: a negatively charged particle that moves around an atom's nucleus



5 proton: a positively charged particle inside an atom's nucleus



6 neutron: a particle with no charge inside an atom's nucleus



7 atomic number: the number of  protons in an atom



8 metal: any of a group of elements that conduct heat and electricity, is shiny and bendable