Use MO diagrams and the bond orders you obtain from them

Solution 35P

Here we have to use MO diagrams and the bond orders  obtained from it to answer the following questions.

Step 1

(a) Is Be2+ stable

1st we have to draw the MO diagram of Be2+ ion .

The electronic configuration of Be atom is, 4Be - 1s2 2s2, thus for Be2,the total number of electrons must be 8. Here Be2+ ion is given hence, total number of electrons in Be2+ ion must be equal to 7.

MO diagram of Be2+ ion,

The MO electronic configuration of Be2+ ion is,

()2 ()2 ()2 ()1

Bond order =

               == ½

If an atom or molecule has certain bond order then it is said to be stable. Greater the bond order more will be the stability.

Thus Be2+ ion is stable.