Chemical bond

chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds.

  • There are two types of chemical bond: covalent bonds and ionic bonds:
  • A covalent bond forms when two atoms share a pair of electrons.
  • Atoms can lose or gain electrons in chemical reactions. When they do this they form charged particles called ions.
  • Chemical bonds occur because the electromagnetic force acts between charged particles. Opposite charges attract one another and like charges repel. The greater the charge, the greater the force.
  • The positively charged protons in the nucleus of an atom and its negatively charged electrons attract each other.
  • An electron positioned between two nuclei will be attracted to both of them, and the nuclei will be attracted toward electrons in this position. This attraction constitutes the chemical bond.
  • Due to the matter-wave nature of electrons and their smaller mass, they must occupy a much larger amount of volume compared with the nuclei, and this volume occupied by the electrons keeps the atomic nuclei in a bond relatively far apart, as compared with the size of the nuclei themselves.
  • The physical world is held together by chemical bonds, which dictate the structure, volume and properties of chemical compounds.
  • A chemical compound consists of two or more atoms from different elements that are chemically bonded together.


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