Home » INORGANIC CHEMISTRY » DIFFERENCE BETWEEN ATOM AND IONS

DIFFERENCE BETWEEN ATOM AND IONS

IONS

  1. An ion is formed when an atom looses electron from its outer shell or gains electrons in its outer shell.
  2. Ions are not electrically neutral because the number of electrons and number of protons are not same.
  3. An ion of an element can be either positive or negative. Positive Ions are called cations and negative Ions are called anions. For example ion of Oxygen is O-2 and ion of Sodium is Na+.
  4. The ionic radius of a cation is always less than the atomic radius of that parent atom. For example ionic radius of Na+ is 1.02 Angstrom and atomic radius of Na is 1.57 Angstrom.
  5. The ionic radius of an anion is always greater than the atomic radius of the parent atom. For example ionic radius of O-2 is 1.40 Angstrom and atomic radius of O is 0.73 Angstrom.

ATOM

  1. An atom is the smallest particle which can take part in chemical reactions and can’t be free state.
  2. Atoms are electrically neutral because the number of electrons and the number of protons present in nucleus are same.
  3. All Atoms of an element are alike.
  4. An atom has more number of electron compared to its cation. And it has less number of electrons compared to its anion. For example Li atom has 3 electrons while Li+ ion has only 2 electrons. Similarly F atom has 9 electrons while F ion has 10 electrons.

Related Posts