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S8P1.f
recognize that there are more that 100 elements and some have same properties
Term | Definition |
---|---|
Periodic table | a chart that organizes info about all of the known elements according to their properties. |
Period | in chemistry, a horizontal row of elements in the periodic table. |
Group | a 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 | describe how likely an element is to form bonds with other elements. |
Metalloid | elements that have properties of both metals and nonmetals. |
Inert | unable to react chemically under normal circumstances. |