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; also called a family
A horizontal row of elements in the modern periodic table.
Elements from groups 1, 2, and 13-18 in the modern periodic table, possessing 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; most metals are ductile and malleable.
Group 1 elements, except for hydrogen, they 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.
The elements in groups 3-12 that are 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 energy level n-1.
rare earth metal
A group of 17 chemically similar metals that includes the elements scandium and yttrium (atomic numbers 21 and 39, respectively) and the lanthanide elements (atomic numbers 57 through 71).
In the periodic table, the f-block elements from period 6 that follow the element lanthanum.
In the periodic table, the f-block elements from period 7 that follow the element actinium.
Elements that are generally gases or dull, brittle solids that are poor conductors of heat and electricity.
A highly reactive group 17 element.
An extremely unreactive group 18 element.
An element that has physical and chemical properties of both metals and nonmetals.