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Phys. Sci. Chap. 5


Periodic Law The law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements.
Period 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.
Ion An atom, radical, or molecule that has gained or lost one or more electrons and has a negative or positive charge.
Metal An element that is shiny and that conducts heat and electricity well.
Nonmetal An element that conducts heat and electricity poorly.
Semiconductor An element or compound that conducts electric current better than an insulator does but not as well as a conductor does.
Alkali Metal One of the elements of Group 1 of the periodic table.
Alkali Earth Metal One of the elements of Group 2 of the periodic table.
Transition Metal One of the metals that can use the inner shell before using the outer shell to bond.
Nobel Gas One of the elements of Group 18 of the periodic table.
Halogen one of the elements of Group 17 of the periodic table.
Created by: osubuckeye1012