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7-2:1 Atoms

Intro to Atoms

TermDefinition
atom the basic particle from which all elements are made
electron a negatively charged particle that is found on the outside of the nucleus of an atom
nucleus the central core of an atom
proton a positively charged particle that is part of an atom's nucleus
neutron a small particle in the nucleus of an atom with no electrical charge
atomic number the number of protons in the nucleus of an atom
mass number the sum of protons and neutrons in the nucleus of an atom
atomic mass the average mass of all the isotopes of an element
periodic table a chart of the elements showing the repeated patterns of their properties
chemical symbol a one or two letter representation of an element
Dmitri Mendeleev a Russian scientist who discovered a set of patterns that applied to all of the elements in 1869
isotope an atom with the same number of protons and a different number of neutrons from other atoms of the same element
Created by: E202019
 

 



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