Vocabulary #6

element: a basic building block of matter; a pure substance that cannot be broken down into anything simpler

compound: a chemical combination of two or more elements into a single susbtance

atom: the smallest unit of an element still has the properties of the element

proton: a particle with a positive charge in the nucleusof an atom

neutron: an uncharged in the nucleus of an atom

electron: a particle with negative care moving around the nucleus of an atom

nucleus: the dense center part of an atom

molecule: a group of more than atom joined together that acts like a single particle