metal- a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity
non-metals- an element or substance that is not a metal.
metaloids- an element properties are intermediate between those of metals and solid nonmetals or semiconductors.
substance- a particular kind of matter with uniform properties.
physical properties- any property that is measurable, whose value describes a state of a physical system
luster- a gentle sheen or soft glow, especially that of a partly reflective surface.
conductivity- the degree to which a specified material conducts electricity, calculated as the ratio of the current density in the material to the electric field that causes the flow of current. It is the reciprocal of the resistivity.
