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• There is a periodic repitition of chemical and physical properties of the elements when they are arranged by increasing number

Group

• The boxes on the periodic table are arranged in order of increasing atomic number into a series of columns called groups or families or rows

 Periods

• Families and rows

Representive Elements

• Elements of groups 1,2 and 13-18 in the modern periodic table, possessing a wide range of chemical and physical properties 

Transition Elements

• Elements in groups 3-12 of the modern periodic table and are further divided into transition metals and inner transition metals

Metals

• Elements that are generally shiny when smooth and clean, solid at room temperature, and good conductors of heat and electricity

Alkali Metals

• Group 1 elements, except for hydrogen, that are reactive and usually exist as compounds with other elements

Alkaline Earth Metals

• Group 2 elements in the modern periodic table and are highly reactive

Transition Elements

• An element in groups 3-12 that is contained in the d-block of the periodic table

Inner Transition Metals

• A type of group B elements that is contained in the f-block of the periodic table and is characterized by a filled outermost orbital

Lathanide Series

• In the periodic table, the f-block elements from period 6 that follow the element lanthanum

Actinide Series

• In the periodic table, the f-block elements from period 7 that follow the element actinium

Nonmetals

• Elements that are generally gases, or brittle, dull-looking solids

Halogens

• A highly reactive group 17 element

Noble Gases

• An extremely unreactive group 18 element

Metalloids

• an element that has physical and chemical properties of both metals and nonmetals

Ion

• An atom or bonded group of atoms that has a positive or negative charge

Ionization Energy

• The energy required to move an electron from a gaseous atom

Octet Rule

• Atoms tend to gain, lose or share electrons in order to acquire a full set of eight valence electrons

Electronegativity

• Indicates the relative ability (of an element) of its atoms to attract electrons in a chemical bond