sodio
____________________
,
calcio
____________________
,
estroncio
____________________
,
azufre
____________________
,
aluminio
____________________
,
carbono
____________________
,
plomo
____________________
,
platino
____________________
,
germanio
____________________
,
galio
____________________
,
antimonio
____________________
,
silicio
____________________
,
litio
____________________
,
niquel
____________________
,
uranio
U