What is a Compound? Definition of a Compound
chemical element contains only one type of atom. If a
substance contains more than one type of atom, it is a compound. In simple terms
can be described as substances that have two or more
Atoms bonded together.
There are millions of different chemical compounds. Different types of compounds
are often expressed as chemical formulas or equations - see
Examples of Compounds.
Compounds - Hydrogen Peroxide
chemical formula for the compound we know as water is H2O
indicating that 2 atoms of Hydrogen combines with 1 atom of oxygen. However, if
another oxygen atom is added a new compound called Hydrogen Peroxide is
created - H2O2 which indicates that 2 atoms of Hydrogen
combines with 2 atoms of oxygen thus creating the compound Hydrogen Peroxide.
A Binary Compound
A binary compound is formed from two
types of elements - their states of matter result in the following types of
+ Metal = Metallic Compound
+ Non-Metal = Ionic compound
Non-Metal + Non-Metal = Covalent compound
Compounds - Categories - Ionic, Molecular and Acids
Most types of compounds fall in to one of
three categories called ionic compounds, molecular compounds, or acids.
Types of Compounds
Compounds - Ionic, Cations, Anions
An Ion is an atom, or group of atoms,
that bears an electric charge. The types of compounds referred to 'Ionic
compounds' consist of combinations of positively charged ions called
CATIONS (which are usually metals - pronounce as 'cat-ion') and negatively charged ions called
ANIONS (which are usually non-metals - pronounce as 'an-eye-on'). In general, a compound will have no
Positively charged ions are called cations because they migrate towards
the cathode (negative pole) in solution - they tend to lose electrons
and form cations
Negatively charged ions are called anions because they migrate towards
the positive pole (anode) and are therefore known as anions - non-metals
tend to gain electrons and form anions
positive cations and the negative anions then attract each other to form
compounds conduct electricity when dissolved in water or when molten
Types of Ionic Compounds
Examples of different types of Ionic
Types of Compounds - What is the difference between a compound
and a molecule?
Molecular compound. What is the
difference between a compound and a molecule?
molecule is formed when two or more atoms join together chemically
compound is a molecule that contains at least two different
compounds are molecules, but not all molecules are compounds
Compounds - Molecular Compound
Molecular compounds consist of
combinations of non-metals. A Binary molecular compound is composed
of only two elements.
Examples: H2O (water).
are easy to identify, as they consist merely of two non-metal elements
are non-conductors of electricity
Examples of Molecular Compounds
Examples of different types of Molecular
Note: Molecular hydrogen (H2),
molecular oxygen (O2) and molecular nitrogen (N2) are
not compounds because each is composed of a single element.
Compounds - Acids
Acids are hydrogen containing compounds.
Acids are easy to recognize- they are composed of hydrogen and an anion (the
hydrogen always comes first), and they have no charge.
Compounds - Examples of Acids
Examples of different types of Acids are
made up of hydrogen and anions, and they do not have charges:
Types of Common Compound
Some of the most
common types and their chemical formulas can be accessed via
Examples of Common Compounds.