Organic Chemistry is defined as the Chemistry of Compounds of Carbon.
Here are the first five Groups:
1) Carboxides [CO and CO2];
2) Hydrocarbons [HC];
3) Carbohydrates [HCO];
4) Proteins [HCON];
5) Nucleotides [HCONP].
By convention chemical compounds containing carbon are considered organic chemicals; but this definition is not entirely true.
Peridotite is composed almost entirely of dark silicate minerals, primarily olivine and pyroxene. Its chemical composition is referred to as ultramafic, containing high levels of magnesium and iron.
Cement, as with all substances, is entirely made of chemical compounds made of chemical elements. From the wording of your question it is not possible to give you a clearer answer as what you are asking is not clear.
Pure gold is an element. It is composed entirely of gold atoms, which have the atomic number 79 on the periodic table. Unlike compounds or mixtures, it cannot be broken down into simpler substances by chemical means.
No, an amide is not a hydrocarbon. Amides are organic compounds containing a carbonyl group attached to a nitrogen atom. Hydrocarbons, on the other hand, are organic compounds composed of only carbon and hydrogen atoms.
Which ones?
alkanes, alkenes, alkynes, ketones, benzenes, phenols, ...
By convention chemical compounds containing carbon are considered organic chemicals; but this definition is not entirely true.
Diamonds are single-element minerals composed entirely of carbon atoms.
Peridotite is composed almost entirely of dark silicate minerals, primarily olivine and pyroxene. Its chemical composition is referred to as ultramafic, containing high levels of magnesium and iron.
Cement, as with all substances, is entirely made of chemical compounds made of chemical elements. From the wording of your question it is not possible to give you a clearer answer as what you are asking is not clear.
It is a compound, and compounds are types of homogeneous matter. Iodine crystals are composed entirely of I2 and as such are the same (homo) throughout (geneous).
Hawaii is the only U.S. state composed entirely of islands.
It is entirely composed of the element magnesium. Mg
Yes, a mineral can be composed entirely of one element. For example, native elements such as gold, silver, and copper are minerals that consist of only one type of atom.
An ionic compound.
Quartz is a common example of a monominerallic rock because it is composed almost entirely of the mineral quartz. Other monominerallic rocks include limestone (composed of calcite) and gypsum (composed of gypsum).