Isotope - Any of two or more forms of an element with the same number of protons in the nucleus but different numbers of neutrons, Mass Number - he total number of protons and neutrons in the nucleus of an atom, Percent Abundance - How common a specific isotope of an element is within a naturally occurring sample of that element; used to find the average atomic mass of that element, Average Atomic Mass - The weighted average of the masses of all the naturally occurring isotopes of an element, Atom - Smallest particleof an element that mantians the properties of that element, Atomic number - The number of protons in the of an atom ; used to determine an elements position in the periodic table the top number in the box, Electrical charge - A property of a subatomic particle ;positive (protons ) ,negative (electrons) , neutral (neutrons), Electron - A negatively charged particle in the electronic cloud surrounding the nucleus, Electronic cloud - A negatively charged space containing electrons that surround the atomic nucleus, Neutron - A neutral particle with no electrical charge within the nucleus, Nucleus - The positively charged center of an atom containing the protons and neutrons, Periodic table - A table in which the elements are organized by the number of protons in the nucleus of the atom., Proton - A positively charged particle within the atomic nucleus, Subatomic particle - A particle smaller than the atom such as a proton neutron or electron,

Isotope and average atomic mass

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