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| Description: Atomic number is the number of protons in the nucleus of an atom Mass number is the number of protons and neutrons in an atom Isotopes Atomic Mass Atomic mass assumes the mass of a: Neutron = 1.008 daltons Proton = 1.007 daltons Electron = 0.0005 daltons The atomic mass/weight of an element is the average mass of all its naturally occurring isotopes Ions, Molecules, and Compounds Ion – an atom that has lost or gained an electron Molecule – 2 or more atoms sharing electrons Compound – a substance that can be broken down into 2 or more different elements Picture Stats: Views: 268 Filesize: 306.66kB Height: 493 Width: 587 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=40672 |