Answer:
D)the first ionization energy (IE1) of B is most probably lower than the first ionization energy (IE1) of A
Explanation:
As mentioned the possible chemical formula for a compound can be predicted from electron configurations of the elements.
The first element 'A' has electronic configuration as "[core]ns²
It means it has two valence electrons and it can give those valence electrons to attain noble gas or full filled stability.
So the element is most likely to form a dipositive ion.
Now for element B the configuration is :[Core]ns²np⁵
thus it has seven valence electrons and it will most likely to accept an electron to gain full filled stability. So B will form a mono negative ion.
The possible formula will be AB₂ [Like MgCl₂]
So the false statements are:
D)the first ionization energy (IE1) of B is most probably lower than the first ionization energy (IE1) of A : the first ionization energy of A will be lower than B as B cannot give an electron easily.
The other statements are correct:
A) element A serves as the reducing agent in the reaction to form AxBy : As A will lose electrons so it will acts as reducing agent and itself gets oxidized
B) yes it is whole number as calculated above.
C) x + y = 1+2 = 3
E) Already calculated that B has oxidation state of -1.
