Properties of an Elements

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Properties of an Elements : : Atomic Structure of an Elements

Isotopes :

  • Atoms having same atomic number but different atomic masses e.g., 816O, 817 O, 818O.
  • In other words they have same number of protons and electrons but different number of neutrons.

Isobars :

  • Atoms having same atomic mass but different atomic number, e.g., 1840Ar and 2040Ca.
  • In other words their corresponding number of electrons, protons and neutrons are not same.

Isomers :

  • Atoms of radioactive elements having same atomic number and same mass number but different radioactive properties.

Isotones :

  • Atoms having same number of neutrons, e.g., 614C, 715N, 816O etc.

Isosters :

  • Molecules of different substances which contain the same number of atoms and the same total number of electrons which leads to similarity in their physical properties, e.g., CO2 and N2O.

Properties of Isotopes :General Studies Question Bank CD

  • They possess same chemical properties.
  • They have different physical properties.
  • Their radioactive properties can be different.
  • They are kept at the same place in the periodic table.

Properties of Isobars :

  • Their atomic masses are nearly equal.
  • They possess different chemical and physical properties.
  • They take different places in the periodic table.
  • They possess different radioactive properties.

Nuclear Stability :

The stability of nucleus depends upon neutron – proton ratio, which possess different values for different nuclei.

  • For light nuclei the ratio of N/P = 1 : e.g., 36 Li has N/P = 1, so it is stable.
  • For the nuclei of medium mass the ratio is between 1 and 1.5 : e.g., 48110 Cd has N/P = 1.29, so it is stable.
  • For heavy nuclei the ratio is 1.5 : e.g., 80202Hg has N/P = 1.5, so it is stable.
  • The nuclei of the atoms having atomic number 84 or more than 84 are unstable.

Binding Energy of the Nucleus :

  • The energy which lessens the effect of repulsive forces of protons in the nucleus is called the binding energy of the nucleus.
  • The more the binding energy of nucleus, the more it is stable.

Difference Between Orbit and Orbital :

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