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positively charged center of an atom the contains protons and neutrons and is surrounded by a cloud of electrons
area around the nucleus of an atom where the atom's electrons are most likely to be found
organized list of all known elements that are arranged by increasing atomic number and by changes in chemical and physical properties
element that typically is a hard, shiny solid, is malleable, and is a good conductor of heat and electricity
first row of inner transition metals listed below the periodic table that includes a series of elements with atomic numbers of 58 to 71
second row of inner transition metals listed below the periodic table that includes a series of elements with atomic numbers of 90 to 103
element that usually is a has or brittle solid at room temperature, is not malleable or ductile, is a poor conductor of heat and electricity, and typically is not shiny
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