molecule that consists of two atoms of the same element, joined by a covalent bond

property of metals and alloys that allows them to be drawn into wires

property of metals and alloys that allows them to be hammered or rolled into thin sheets

element that is shiny, malleable, ductile, and a good conductor of heat and electricity

occurs because some electrons move freely among a metal's positively charged ions, explains properties such as ductility and the ability to conduct electricity

elements that share some properties with metals and some with nonmetals

element that usually is a gas or brittle solid at room temperature, is not malleable or ductile, is a poor conductor of heat and electricity, and typically is not shiny

element, such as radium, whose nucleus breaks down and emits particles and energy

material that conducts an electric current under certain conditions

elements in groups 3-12 of the periodic table

elements having more than 92 protons, all of which are synthetic and unstable