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S8P1.F
Recognizing that there are more than 100 elements
Term | Definition |
---|---|
Periodic table | elements' properties followed a pattern that repeated every seven elements. |
Period | in chemistry a horizontal row of elements in the periodic table. |
Group | vertical column of elements in the periodic table elements in a group share chemical properties. |
valence electrons | an electron that is found in the outermost shell of an atom and that determines the atom's chemical properties. |
Reactivity | how likely an element is to form bonds with other elements. |
Methalloid | elements that have properties of both metals and nonmetals. |
Inert | unable to react chemically under normal circumstances. |