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Alkali Metals

Group 1, 1 electron in outer level, very reactive, soft, silver, shiny, low density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium

Alkaline Earth Metals

Any metal in group 2A of the periodic table

Anion

a negatively charged ion

Atomic Radius

one-half of the distance between the center of identical atoms that are not bonded together.

Cation

a positively charged ion

Electronegativity

the tendency of an atom or radical to attract electrons in the formation of an ionic bond

Halogens

group 17; contains nonmetals; 7 electrons in its outermost energy level; very reactive; poor conductors of electric current; never in its uncombined form in nature; combine with most metals to form salts

Inner Transition Metal

a type of group B element that is contained in the P-block of the periodic table and is characterized by a filled outermost S orbital, and filled or partially filled 4F and 5F orbital

Ion

a particle that is electrically charged (positive or negative)

Ionization Energy

the amount of energy required to remove an electron from an atom

Metalloids

elements that have characteristics of metals and nonmetals

Metals

have a shiny or metallic luster, good conductors of heat and electricity

Noble Gases

one of the elements of group 18 of the periodic table(helium, neon,argon, krypton, xenon, and radon); noble gases are unreactive

Nonmetals

elements that are usually dull in appearance, poor conductors of heat and electricity, gases at room temperature

Periodic Law

the principle that chemical properties of the elements are periodic functions of their atomic numbers

Representative Elements

a group in the periodic table which includes metals, metalloids, and nonmetals

Transition Metal

An Element in group 3 through 12 of the periodic table

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