VOCABULARY:
Isoelectronic Elements: are elements that have the same electron configuration.
Periodic Law: The properties of the elements are a periodic function of their atomic numbers.
Periodic Table: A pictorial arrangement of the elements based upon their atomic numbers and electron configurations.
Transition Element: An element whose highest energy electron is in the d orbital.
Lanthanoid Series: Fourteen elements beginning with lanthanum in which the highest energy electrons to be in the 4f sublevel.
Actinoid Series: Fourteen elements beginning with actinium in which the highest energy electrons to be in the 5f sublevel.
Period: A horizontal row on the periodic table.
Group: The elements of a vertical column in the periodic table.
Octet Rule: An especially stable arrangement of four pairs of electrons in the outer energy level of an atom.
Family: The elements composing a vertical column of the periodic table.
Metal: An element that tends to lose electrons in chemical reactions.
Nonmetal: An element that tends to gain electrons in chemical reactions.
Metalloid: An element that has properties characteristic of a metal and a nonmetal.
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