Atomic mass. Metal/non-metal: metals tend to be malleable, good conductors of heat and electricity, shiny and lustrous.
(metals; tend; to be malleable, good conductors of heat and electricity, shiny and lustrous) (metals; to be; malleable, good conductors of heat and electricity, shiny and lustrous)
metals metals
tend to be
to be malleable, good conductors of heat and electricity, shiny and lustrous
malleable, good conductors of heat and electricity, shiny and lustrous