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Chem Ch 6 Vocab


Periodic Law States that the elements are arranged by increasing atomic number, there is a periodic repetition of their properties
Group A vertical column of element in the periodic table arranged in order of increasing atomic number; also called a family
Period A horizontal row of elements in the modern periodic table
Representative Element Elements from groups 1, 2, and 13-18 in the modern periodic table, possessing a wide range of chemical and physical properties
Transition Element Elements in groups 3-12 of the modern periodic table and are further divided into transition metals and inner transition
Metal An element that is solid at room temperature, a good conductor of heat nad electricity, and generally is shiny; most metals are ductile and malleable
Alkaline Earth Metal Group 2 elements in the modern periodic table and are highly reactive
Transition Metal Elements in groups 3-12 that is contained in the 9-block of the periodic table and, with some exceptions, is characterized by a filled outermost s orbital of energy level n, and filled or partially filled d orbitals of energy level n-1
Inner Transition Metal A type of group B element that is contained in the f-block of the periodic table and is characterized by a filled outermost orbital, and filled or partially filled 4f and 5f orbitals
Lanthanide Series In the periodic table, the f-block elements from period 6 hat follow the element lanthanum
Actinide Series In the periodic table, the f-block elements from period 7 that follow the element actinium
Nonmetal Elements that are generally gases or dull, brittle solids that are poor conductors of heat and electricity
Halogen A highly reactive group 17 element
Noble Gas An extremely unreactive group 18 elecment
Metalloid An element that has physical and chemical properties of both metals and nonmetals
Valance Electron electron in an atom's outermost orbitals; determines the chemical properties of an atom
Principle Energy Level the major energy level of an atom
Ion An atom or bonded group of atoms with a positive or negative charge
Ionization Energy The energy required to remove an electron from a gaseous atom; generally increases in moving from left-to-right across a period and decreases in moving down a group
Octet Rule States that atoms lose, gain, or share electrons in order to acquire the stable electron configuration of a noble gas
Electronegativity Indicates the relative ability of an element's atoms to attract electrons in a chemical bond
Atomic Number the number of protons in an atom
Created by: Emmelee



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