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Question

How many valence electrons would be found in Anatomy with the atomic number of 51?


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Solution

Valence electrons:

  • The electrons which are distributed in the outermost shell of the atom are called valence electrons.
  • These valence electrons can form a chemical bond only if the outer shell remains unclosed.

Valence electrons in an Antimony atom:

  • The element Antimony Sb is in the fifth period and belongs to the Alkali metals group (group 15).
  • The atomic number of Antimony Sb is 51.
  • The electronic configuration of Antimony Sb can be written as 1s22s22p63s23p64s23d104p65s25p34d10.
  • The valence electrons are the sum of the electrons in the outermost shell, that is two 5s electrons and three 5p electrons which gives a total of five valence electrons.

Therefore, the valence electron in an AntimonySb atom is 5.


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