Obviousaly it depends on what part of the planet you are on but in Australia iron ore is plentiful.
Scarce things can include:wood,water,air,coil,gold,any special jewels,Gasoline,and others things people usually want.
iron and sulphur
No elements are made up of a compound. I think you mean 'Which elements make up iron oxide?', and the answer to that is iron and oxygen.
pig iron, wrought iron and cast iron. These are broad classifications used commercially, they can be subclassified. Chemically we say that its pure or impure, contains sulphur/phosphorous/impurities(slag, etc.)/carbon in so and so % range
When iron is a liquid, it does not. Solid iron, however, does.
'Plentiful , or 'Abundance'.
The word plentiful is the antonym of scarce.
scarce
Geothermal energy is not scarce it is plentiful because it is renewable.
Abundant, or plentiful
scarce.
Sand, grains of the mineral quartz (SiO2), is plentiful.
Iron ore is considered to be plentiful on a global scale, as it is one of the most abundant metallic elements in the Earth's crust. However, the distribution of high-quality iron ore deposits can vary regionally, leading to some areas having more readily accessible deposits than others.
scarce rare limited
The 6 letter word for plentiful is Plenty.
little, scarce, lacking, meager, few
a synonym for rare is scarce; difficult to find; not plentiful