Francium hasn't ores; infinitesimal amounts of francium exist in some uranium ores.
FrIO4
The chemistry of francium is practically unknown today.
Taconite or Hematite
Those ores which contain metal in the form of oxides are called as oxide ores.
oil, methane gas, coal, wood, mercury, iron ores, copper ores, zinc ores, lead ores
Extraction of metals from its ores and formation of ores. Studying their properties, their alloys,refining of ores.
Ores.
Their importance is that these ores can be extracted into metals .
Ores are finite, yes.
ores must be nonrenwable
Metal ores are used as resources from which metals may be extracted.
yes , sulphur have ores. such ores are called sulphide ores. these sulphide ores are purified by the process called roasting. this is the process which involves heating with oxygen and then reducing into original metals. eg: copper sulphide, zinc sulphide, etc.