Answer to Question #91729 in General Chemistry for Pearl Menezes

Question

The electronic configuration of two elements X and Y are given below.
X – [Ar]4s2
Y- [Ne]3s2
3p5
.The formula of ionic compound formed is.

Answer 1

Since element X has valence 2 electrons, it wil tend to loose both the electron and form X(II)

And element Y has 7 valence electrons and wants to accept 1 electron.

Thus from the above statements it is clear that 2 atoms of element Y will combine with 1 atom of element X to give the ionic compound with formula:

XY₂

Also from electronic configuration one can say X is Ca

and Y is Cl.

Thus actual formula is CaCl₂