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period table

TermDefinition
Dmitri Mendeleev he formulated the Periodic law
Period one of the horizontal rows in the periodic table
family In chemistry a group (also know as a family) is a column of elements in the periodic table of chemical elements
Valence electron an electron associated with atom and a chemical bond
Electron shells the out side part of a nucleus
element per atom
Atomic the number of protons and electrons
Created by: 22apolster
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