Table: noble_metal_data
Columns: element
group
period
reaction
potential

Question: Which potential's period 5 is 4 and has an element of antimony?
SQL: SELECT "potential" FROM noble_metal_data WHERE "period" = 5 AND "element" = 'antimony'

Question: Which lowest period's element is ruthenium?
SQL: SELECT MIN("period") FROM noble_metal_data WHERE "element" = 'ruthenium'

Question: Which highest period's element is platinum?
SQL: SELECT MAX("period") FROM noble_metal_data WHERE "element" = 'platinum'