sodium , lithium and potassium are highly electropositive elements placed in
all these three have something in common . if you look at the electronic configuration of these elements (alkali metals) its identical.
here we got electronic configuration of all the three.
shell | K| L | M | N
Lithium (Li) | 2 | 1 |
Sodium (Na) | 2 | 8 | 1
potassium (K) | 2 | 8 | 8 | 1.
This data shows something identical in all that is presence of 1
This is the reason that they readily give
so these have a greater tendency to form cations. and give up their
every atom wants to attain a sense of nobility so it requires to either gain or lose electrons . losing 1 electron doesn't require much energy lose