mendeleev table - period 7

actinium atom atomic background beaker blocks bohrium chart chemical chemistry class color compare configuration copernicium darmstadtium different dubnium education electronegative electrons element frame francium full gas graphic groups hassium illustration isolated lab lavoisier mass meitnerium mendeleev molecule nature nuclear number order periodic periods physics radium research roentgenium row rutherfordium school science scientific script seaborgium shot signs symbols systematize table teach technique technology text typescript ununhexium ununoctium ununpentium ununquadium ununseptium ununtrium valence vector weight