Pls answer the following with explanation

Dear student, 
Maximum no. of electrons in a given shell is given by formula 2n2, where​​​​​​ n = shell number
The electronic configuration of the elements are:
The elements which have less than 4 electrons in its valence shell form cations.
The elements with 4 or more electrons but less than 8 electrons form anions. 
The elements which have complete octet in their valence shell are called inert gases. 
Elements with more no. of proton and less number of electrons are cations. 
Elements with more no. of electrons than protons are cations. 
a. Element is A cation. 
b. Element D is anion
c. Element B is inert gas. 

  • 0
Please find this answer

  • 0
What are you looking for?