The Basic Building Blocks of Everything

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The Basic Building Blocks of Everything

Modern Science had helped us to know that Everything that exists are made of simple basic building blocks called Atoms.  Many atoms combine to form Molecules.  Atoms with similar structure and properties are said to be belong to certain type of Element.  Through this article I going to explain what is an atom , a molecule and an element.

What is an atom?

Image result for structure of an atom
The term 'atom' comes from the Greek word 'atomos', meaning 'indivisible'.  Earlier, it was considered that atoms were the smallest unit of a substance and could not be split further.  Today,we know that atoms can be further split into smaller particles.  An atom is made up of the atomic nucleus, which consists of positively charged protons and an equal number of neutrons, and atomic shells.  These are occupied by negatively charged electrons, which move at high speeds around the atomic nucleus-like planets around the sun.




What is a molecule?

Related imageA molecule consists of two or more atoms, which are held together chemical bonds.  A water molecule is made up of two atoms of hydrogen(H) and one atom of oxygen (O).  Thus, the chemical formula of water is H2O.  Elements also frequently occur in molecular forms.  For example, two atoms of chlorine, oxygen, and nitrogen combine to form Cl2, O2 and N2, respectively.  There are complicated molecules as well, such as those of plastic.








What is an element?

An element is a 'pure substance' consisting of atoms of the same kind.  Elements cannot be broken down into simpler substances, but they can combine with other elements to make new substances.  Each elemjent has a unique symbol, for example, 'O' means oxygen, 'Na' means sodium, and 'Cl' means chlorine.  The number of protons in the atomic nucleus determines the element.  This number is called the atomic number of the element.  
Image result for oxygen molecule

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