Question

“The atomic number of Lithium is 3.” On the basis of this information answer the question that follows: 

(a) Write the electronic configuration of Li 

(b) To which group Li belong? 

(c) Find valency of Li. 

(d) Identify type of ion it will form. 

(e) Write down the formula of the compound formed by it.

Answer 1

(a) Li₃- 2, 1 

(b) Li belongs to 1 group. 

(c) The valency of Li is 1 because it contains one valence electron. 

(d) It will form positive ion because it has one valence electron so it will lose this one electron to acquire stable noble gas electronic configuration and it will form positive ion. 

(e) The formula of the compound formed by it is LiX