states that when the elements are arranged by increasing atomic number, there is a periodic repetition of their properties.

a vertical column of elements in the periodic table arranged in order of increasing atomic number

a horizontal row of elemnts in the modern periodic table

elements from groups 1,2, and 13-18 in the modern periodic table, possesing a wide range of chemical and physical properties.

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

an element that is solid at room temperature, a good conductor of heat and electricity, and generally is shiny

ALKALI METAL

group 1 elements, except for hydration, they are reactive and usually exist as compounds with other elements

ALKILINE EARTH METAL

group 2 elements in the modern periodic table and are highly active

an element in groups 3-12 that is contained in the d-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 every level n-1

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

electron in an atom's outermost orbitals; determines the chemical properties of an atom

LANTHANIDE SERIES

in the periodic table, the f-block elements from period 6 that follow the element lanthnum

in the periodic table, the f-block elements from period 7 that follow the element actinum

elements that are generally gases or dull, brittle solids that are poor conductors of heat and electricity

a higly reactive group 17 element

an extremely unreactive group 18 element

an element that has physical and chemical properties pf beoth metals and nonmetals

an atom or bonded group of atoms with a positive or negative charge

the energy required to remove an electron from gaseous atom

states that atoms lose, gain, or share electrons in order to acquire the stable electron configuration of a noble gas

indicates the relative ability of an element's atoms to attract electrons in a chemical bond