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Why seventh group elements are known as halogens?


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Solution

Group 7 elements:

  • Group 7 actually represents the 17th group of the periodic table and group 17 elements are known as halogens.
  • The elements of the group (Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), and Astatine (At) ) are non-metals and have 7 valence electrons in their valence shell.

Meaning of word ‘Halogens’:

  • The word halogen means ‘salt forming’ compounds.
  • Since all halogens have 7 electrons in their valence shell, they react rapidly with metals to form salts. Thus, the seventh group of elements is known as Halogens.


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