Which of the following elements would lose an electron easily?
In particular, cesium (Cs) can give up its valence electron more easily than can lithium (Li). In fact, for the alkali metals (the elements in Group 1), the ease of giving up an electron varies as follows: Cs > Rb > K > Na > Li with Cs the most likely, and Li the least likely, to lose an electron
It can be either they can have a negative or positive charge more specifically negatively charged molecule would called an anion and a positive one would be cation.
