Atoms – Definition, Components and Structure

Atoms – Definition, Components and Structure

Atoms are the basic units of matter and the defining structure of elements. The term "atom" comes from the Greek word for indivisible, because it was once thought that atoms were the smallest things in the universe and could not be divided.

Every atom is made up of three subatomic particles:

  • Electrons - the smallest part of an atom, these particles are too small to measure. They are the 'planets' in the Rutherford-Bohr model of the atom as they rotate around the nucleus in a cloud. Electrons are negatively charged.

  • Protons - found in the nucleus of an atom, these particles are the positively charged components of the atom.

  • Neutrons - also found in the nucleus, the neutrons have no charge. Both the neutrons and protons are almost 2,000 times larger than the electrons.

Structure of Atom

 

 

 

 

Post By : Arpita Singh 18 Aug, 2017 tag : Chemistry

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Arpita Singh