The smallest particle of an element that retains the properties of the elementis called ____.____ is a subatomic particle carrying a charge equal to but opposite that of an electron____ is a subatomic particle that has a mass nearly equal to that of a proton, but it carries no electric charge The negatively charged particle that are part of all forms of matter are now known as ____the almost all of the atom’s positive charge and almost all of its mass were contained in a tiny,dense region in the center of the atom, which he called ____

The Atom

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