Sat March 21, 2015 By: Navya Benny

Why are alkali metals soft?What is the actual reason for it being soft?

Expert Reply
Prachi Sawant
Sat March 21, 2015
There is only single electron in the valence shell of alkali metals due to which the metallic bonding is weak in nature. Hence, alkali metals are soft. 
There softness increases with increasing atomic numer (increasing period number) as metallic bonding becomes still more weaker.
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