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when the elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties
good conductors of heat and electric current; metals tend to be shiny, ductile, and malleable
an element in group 8A of the periodic table; the s and p sublevels of the highest occupied energy level are filled
an element in an A group in the periodic table; as a group these elements display a wide range of physical and chemical properties. In their atoms, the s an p sublevels in the highest occupied energy level are partially filled
one of the group B elements in which the highest occupied s sublevel and a nearby d sublevel generally contain electrons
inner transition metals
an element in the lanthanide or actinide series; the highest occupied s subevel and a nearby f sublevel of its atoms generally contain electrons; also called inner transition element
an arrangement of elemetns in which the elements are separated into groups based on a set of repeating properties
one-half the distance between the nuclei of two atoms of the same element when the atoms are joined
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