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Distinguish between atoms and molecules.

Atom the smallest unit of an element that maintains the properties of that element.
Element a substance that cannot be separated or broken down into simpler substances by chemical means.
Nucleus in physical science,an atom's central region, which is made up of protons and neutrons.
Protons a subatomic particle that has a positive charge and that is found in the nucleus of an atom.
Neutron a subatomic particle that has no charge and that is found in the nucleus of an atom.
Electron a subatomic particle that has a negative charge.
Atomic Number the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of the element.
Neutral having no overall charge.
Atomic Mass the mass of an atom expressed in atomic mass units.
Chemical Symbol a one or two letter code that represents an element
Pure Substance a sample matter ,either a single element or a single compound, that has definite chemical and physical properties.
Created by: 88robwas