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Sometimes, based on the electron configurations of the elements involved, a possible chemical formula for a compound can be predicted. Elements A ([core]ns2) and B ([core]ns2np5) react to form ionic compound AxBy. Select the false statement below :
A) element A serves as the reducing agent in the reaction to form AxBy
B)the x and y in AxBy must reflect the lowest whole number ratio of moles of A to moles of B
C)x + y = 3
D)the first ionization energy (IE1) of B is most probably lower than the first ionization energy (IE1) of A
E)the B in AxBy has a −1 oxidation state

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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.

pstnonsonjoku

The false statement is that; "the first ionization energy (IE1) of B is most probably lower than the first ionization energy (IE1) of A"

The first ionization energy is the energy required to remove the first electron from an atom. This is a periodic trend that increases across the period but decreases down the group.

Looking at the electron configurations of A and B it is clear that A is an alkaline earth metal while B is a halogen. As such, A is a reducing agent and B will have an oxidation state of -1 as expected of halogens.

The compound will have the formula AX2 hence x + y = 3. However, since ionization energy increases across the period, the first ionization energy of B must certainly be greater than that of A.

Learn more: https://brainly.com/question/15178305

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