alkanes, alkenes, alkynes, ketones, benzenes, phenols, ...
Which ones?
An ionic compound.
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).
A pure compound is made up entirely of one substance that has a single chemical property. A mixture is made up of two or more pure compounds with distinct chemical properties.
No. Ammonia is composed entirely of nonmetals. It is a covalent compound.
In most cases, when two elements form a compound, the new compound has a set of chemical properties that are entirely different from its reactants. However, in the case of diatomic compounds, such as O2, then yes, the compound retains the properties of its elemental parts.
Al2O3
By convention chemical compounds containing carbon are considered organic chemicals; but this definition is not entirely true.
Safety precautions for use with chemical compounds depend entirely on what particular compounds are being used, and how they are being stored and handled.
It depends entirely on the configuration and compound. Silicate tetrahedrons (SiO4) are one of the most common cations found in the Earth's crust. Silicon dioxide (SiO2) is one of the most common compounds.
Basalt, welcome
"A chemical compound is a pure chemical substance consisting of two or more different chemical elements"So says wikipedia!O2 does not have two or more different chemical elements and so cannot be a compound. It is, however, a molecule (which only requires 2 or more atoms connected by bonds).To clarify - all compounds are molecules...but not all molecules are compounds.O2 represents a molecule of oxygen.An atom is the smallest component of any element having all the chemical properties of that specific element.A molecule is the simplest complete structural unit of an element or compound that can exist in nature.A compound is a substance consisting of two or more different elements or molecules formed by the chemical union of two or more elements or molecules in definite proportion by weight.