What Is A Molecule?


What Are Molecules?

A molecule is the simplest unit of chemical compound that can exist and is composed of two or more atoms held together by chemical bonds.

Concept Of Molecules

Molecules can be represented with a chemical formula which shows the types of atoms in the molecule, and, uses subscripts, to show how many of each type of atom is present.

A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound or molecule, using a single line of chemical element symbols, numbers, and sometimes also other symbols,

such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs. -Chemical formulas are most often expressed as –Molecular formulas wich indicate the simple numbers of each type of atom in a molecule of a molecular substance.

The structural formula of a chemical compound is a graphic representation of the molecular structure, showing how the atoms are arranged.

of a molecule shows the symbol for every atom, and it shows every bond.


Types Of Molecules

Diatomic Molecules — A diatomic atom consists of only two atoms, the same or different chemical elements.Examples of diatomic molecules are O2 and CO.

Oxygen(O2) Molecule

Heteronuclear Diatomic Molecules — Heteronuclear diatomic molecule consists of two atoms of the same element.There are seven diatomic Elements: Hydrogen (H2), Nitrogen (N2), Oxygen ( O2), Fluorine ( (F2), Chlorine ( (Cl2), –Iodine ( (I2) and Bromine (Br2) . These seven elements are so reactive that they can be found very often bonded with another atom of the same type.

Hydrogen(H2) Molecule

Homonuclear diatomic molecules –A homonuclear diatomic molecule consists of two atoms of different elements chemically combined with each other. Examples of homonuclear diatomic molecules are: carbon monoxide, hydrochloric acid (HCl) , and Hydrogen Flouride (HF)

Carbon Monoxide(CO) Molecule





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