Question

[s] which of the following elements does not lose an election
easily
(a) Mg
(b) Na
(c) K
(d) Ca​

Answer 1

Flourine

Flourine is the most electronegative element .... hence it does not lose an electron easily.... It has 7 electrons in the outer most orbit.. It is the smallest size atom too

Answer 2

Answer:

in every option means

Mg , Na , K , Ca

all elements loose electron..

But I think .. you haven't written fluorine option

This question is the question of NCERT Book so.... the right answer is Florine