Question

Why seventh group elements are known as halogens?

Answer 1

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.